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Merge tag 'for-linus-v3.10-rc6' of git://oss.sgi.com/xfs/xfs
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / mac80211 / mlme.c
1 /*
2 * BSS client mode implementation
3 * Copyright 2003-2008, Jouni Malinen <j@w1.fi>
4 * Copyright 2004, Instant802 Networks, Inc.
5 * Copyright 2005, Devicescape Software, Inc.
6 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
7 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/if_ether.h>
16 #include <linux/skbuff.h>
17 #include <linux/if_arp.h>
18 #include <linux/etherdevice.h>
19 #include <linux/moduleparam.h>
20 #include <linux/rtnetlink.h>
21 #include <linux/pm_qos.h>
22 #include <linux/crc32.h>
23 #include <linux/slab.h>
24 #include <linux/export.h>
25 #include <net/mac80211.h>
26 #include <asm/unaligned.h>
27
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
30 #include "rate.h"
31 #include "led.h"
32
33 #define IEEE80211_AUTH_TIMEOUT (HZ / 5)
34 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10)
35 #define IEEE80211_AUTH_MAX_TRIES 3
36 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5)
37 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5)
38 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10)
39 #define IEEE80211_ASSOC_MAX_TRIES 3
40
41 static int max_nullfunc_tries = 2;
42 module_param(max_nullfunc_tries, int, 0644);
43 MODULE_PARM_DESC(max_nullfunc_tries,
44 "Maximum nullfunc tx tries before disconnecting (reason 4).");
45
46 static int max_probe_tries = 5;
47 module_param(max_probe_tries, int, 0644);
48 MODULE_PARM_DESC(max_probe_tries,
49 "Maximum probe tries before disconnecting (reason 4).");
50
51 /*
52 * Beacon loss timeout is calculated as N frames times the
53 * advertised beacon interval. This may need to be somewhat
54 * higher than what hardware might detect to account for
55 * delays in the host processing frames. But since we also
56 * probe on beacon miss before declaring the connection lost
57 * default to what we want.
58 */
59 static int beacon_loss_count = 7;
60 module_param(beacon_loss_count, int, 0644);
61 MODULE_PARM_DESC(beacon_loss_count,
62 "Number of beacon intervals before we decide beacon was lost.");
63
64 /*
65 * Time the connection can be idle before we probe
66 * it to see if we can still talk to the AP.
67 */
68 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ)
69 /*
70 * Time we wait for a probe response after sending
71 * a probe request because of beacon loss or for
72 * checking the connection still works.
73 */
74 static int probe_wait_ms = 500;
75 module_param(probe_wait_ms, int, 0644);
76 MODULE_PARM_DESC(probe_wait_ms,
77 "Maximum time(ms) to wait for probe response"
78 " before disconnecting (reason 4).");
79
80 /*
81 * Weight given to the latest Beacon frame when calculating average signal
82 * strength for Beacon frames received in the current BSS. This must be
83 * between 1 and 15.
84 */
85 #define IEEE80211_SIGNAL_AVE_WEIGHT 3
86
87 /*
88 * How many Beacon frames need to have been used in average signal strength
89 * before starting to indicate signal change events.
90 */
91 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4
92
93 /*
94 * All cfg80211 functions have to be called outside a locked
95 * section so that they can acquire a lock themselves... This
96 * is much simpler than queuing up things in cfg80211, but we
97 * do need some indirection for that here.
98 */
99 enum rx_mgmt_action {
100 /* no action required */
101 RX_MGMT_NONE,
102
103 /* caller must call cfg80211_send_deauth() */
104 RX_MGMT_CFG80211_DEAUTH,
105
106 /* caller must call cfg80211_send_disassoc() */
107 RX_MGMT_CFG80211_DISASSOC,
108
109 /* caller must call cfg80211_send_rx_auth() */
110 RX_MGMT_CFG80211_RX_AUTH,
111
112 /* caller must call cfg80211_send_rx_assoc() */
113 RX_MGMT_CFG80211_RX_ASSOC,
114
115 /* caller must call cfg80211_send_assoc_timeout() */
116 RX_MGMT_CFG80211_ASSOC_TIMEOUT,
117
118 /* used when a processed beacon causes a deauth */
119 RX_MGMT_CFG80211_TX_DEAUTH,
120 };
121
122 /* utils */
123 static inline void ASSERT_MGD_MTX(struct ieee80211_if_managed *ifmgd)
124 {
125 lockdep_assert_held(&ifmgd->mtx);
126 }
127
128 /*
129 * We can have multiple work items (and connection probing)
130 * scheduling this timer, but we need to take care to only
131 * reschedule it when it should fire _earlier_ than it was
132 * asked for before, or if it's not pending right now. This
133 * function ensures that. Note that it then is required to
134 * run this function for all timeouts after the first one
135 * has happened -- the work that runs from this timer will
136 * do that.
137 */
138 static void run_again(struct ieee80211_if_managed *ifmgd, unsigned long timeout)
139 {
140 ASSERT_MGD_MTX(ifmgd);
141
142 if (!timer_pending(&ifmgd->timer) ||
143 time_before(timeout, ifmgd->timer.expires))
144 mod_timer(&ifmgd->timer, timeout);
145 }
146
147 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata)
148 {
149 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER)
150 return;
151
152 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
153 return;
154
155 mod_timer(&sdata->u.mgd.bcn_mon_timer,
156 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout));
157 }
158
159 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata)
160 {
161 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
162
163 if (unlikely(!sdata->u.mgd.associated))
164 return;
165
166 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
167 return;
168
169 mod_timer(&sdata->u.mgd.conn_mon_timer,
170 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME));
171
172 ifmgd->probe_send_count = 0;
173 }
174
175 static int ecw2cw(int ecw)
176 {
177 return (1 << ecw) - 1;
178 }
179
180 static u32 chandef_downgrade(struct cfg80211_chan_def *c)
181 {
182 u32 ret;
183 int tmp;
184
185 switch (c->width) {
186 case NL80211_CHAN_WIDTH_20:
187 c->width = NL80211_CHAN_WIDTH_20_NOHT;
188 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
189 break;
190 case NL80211_CHAN_WIDTH_40:
191 c->width = NL80211_CHAN_WIDTH_20;
192 c->center_freq1 = c->chan->center_freq;
193 ret = IEEE80211_STA_DISABLE_40MHZ |
194 IEEE80211_STA_DISABLE_VHT;
195 break;
196 case NL80211_CHAN_WIDTH_80:
197 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
198 /* n_P40 */
199 tmp /= 2;
200 /* freq_P40 */
201 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
202 c->width = NL80211_CHAN_WIDTH_40;
203 ret = IEEE80211_STA_DISABLE_VHT;
204 break;
205 case NL80211_CHAN_WIDTH_80P80:
206 c->center_freq2 = 0;
207 c->width = NL80211_CHAN_WIDTH_80;
208 ret = IEEE80211_STA_DISABLE_80P80MHZ |
209 IEEE80211_STA_DISABLE_160MHZ;
210 break;
211 case NL80211_CHAN_WIDTH_160:
212 /* n_P20 */
213 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
214 /* n_P80 */
215 tmp /= 4;
216 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
217 c->width = NL80211_CHAN_WIDTH_80;
218 ret = IEEE80211_STA_DISABLE_80P80MHZ |
219 IEEE80211_STA_DISABLE_160MHZ;
220 break;
221 default:
222 case NL80211_CHAN_WIDTH_20_NOHT:
223 WARN_ON_ONCE(1);
224 c->width = NL80211_CHAN_WIDTH_20_NOHT;
225 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
226 break;
227 }
228
229 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
230
231 return ret;
232 }
233
234 static u32
235 ieee80211_determine_chantype(struct ieee80211_sub_if_data *sdata,
236 struct ieee80211_supported_band *sband,
237 struct ieee80211_channel *channel,
238 const struct ieee80211_ht_operation *ht_oper,
239 const struct ieee80211_vht_operation *vht_oper,
240 struct cfg80211_chan_def *chandef, bool verbose)
241 {
242 struct cfg80211_chan_def vht_chandef;
243 u32 ht_cfreq, ret;
244
245 chandef->chan = channel;
246 chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
247 chandef->center_freq1 = channel->center_freq;
248 chandef->center_freq2 = 0;
249
250 if (!ht_oper || !sband->ht_cap.ht_supported) {
251 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
252 goto out;
253 }
254
255 chandef->width = NL80211_CHAN_WIDTH_20;
256
257 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan,
258 channel->band);
259 /* check that channel matches the right operating channel */
260 if (channel->center_freq != ht_cfreq) {
261 /*
262 * It's possible that some APs are confused here;
263 * Netgear WNDR3700 sometimes reports 4 higher than
264 * the actual channel in association responses, but
265 * since we look at probe response/beacon data here
266 * it should be OK.
267 */
268 if (verbose)
269 sdata_info(sdata,
270 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n",
271 channel->center_freq, ht_cfreq,
272 ht_oper->primary_chan, channel->band);
273 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
274 goto out;
275 }
276
277 /* check 40 MHz support, if we have it */
278 if (sband->ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40) {
279 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
280 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
281 chandef->width = NL80211_CHAN_WIDTH_40;
282 chandef->center_freq1 += 10;
283 break;
284 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
285 chandef->width = NL80211_CHAN_WIDTH_40;
286 chandef->center_freq1 -= 10;
287 break;
288 }
289 } else {
290 /* 40 MHz (and 80 MHz) must be supported for VHT */
291 ret = IEEE80211_STA_DISABLE_VHT;
292 /* also mark 40 MHz disabled */
293 ret |= IEEE80211_STA_DISABLE_40MHZ;
294 goto out;
295 }
296
297 if (!vht_oper || !sband->vht_cap.vht_supported) {
298 ret = IEEE80211_STA_DISABLE_VHT;
299 goto out;
300 }
301
302 vht_chandef.chan = channel;
303 vht_chandef.center_freq1 =
304 ieee80211_channel_to_frequency(vht_oper->center_freq_seg1_idx,
305 channel->band);
306 vht_chandef.center_freq2 = 0;
307
308 switch (vht_oper->chan_width) {
309 case IEEE80211_VHT_CHANWIDTH_USE_HT:
310 vht_chandef.width = chandef->width;
311 break;
312 case IEEE80211_VHT_CHANWIDTH_80MHZ:
313 vht_chandef.width = NL80211_CHAN_WIDTH_80;
314 break;
315 case IEEE80211_VHT_CHANWIDTH_160MHZ:
316 vht_chandef.width = NL80211_CHAN_WIDTH_160;
317 break;
318 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
319 vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
320 vht_chandef.center_freq2 =
321 ieee80211_channel_to_frequency(
322 vht_oper->center_freq_seg2_idx,
323 channel->band);
324 break;
325 default:
326 if (verbose)
327 sdata_info(sdata,
328 "AP VHT operation IE has invalid channel width (%d), disable VHT\n",
329 vht_oper->chan_width);
330 ret = IEEE80211_STA_DISABLE_VHT;
331 goto out;
332 }
333
334 if (!cfg80211_chandef_valid(&vht_chandef)) {
335 if (verbose)
336 sdata_info(sdata,
337 "AP VHT information is invalid, disable VHT\n");
338 ret = IEEE80211_STA_DISABLE_VHT;
339 goto out;
340 }
341
342 if (cfg80211_chandef_identical(chandef, &vht_chandef)) {
343 ret = 0;
344 goto out;
345 }
346
347 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) {
348 if (verbose)
349 sdata_info(sdata,
350 "AP VHT information doesn't match HT, disable VHT\n");
351 ret = IEEE80211_STA_DISABLE_VHT;
352 goto out;
353 }
354
355 *chandef = vht_chandef;
356
357 ret = 0;
358
359 out:
360 /* don't print the message below for VHT mismatch if VHT is disabled */
361 if (ret & IEEE80211_STA_DISABLE_VHT)
362 vht_chandef = *chandef;
363
364 while (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
365 IEEE80211_CHAN_DISABLED)) {
366 if (WARN_ON(chandef->width == NL80211_CHAN_WIDTH_20_NOHT)) {
367 ret = IEEE80211_STA_DISABLE_HT |
368 IEEE80211_STA_DISABLE_VHT;
369 goto out;
370 }
371
372 ret |= chandef_downgrade(chandef);
373 }
374
375 if (chandef->width != vht_chandef.width && verbose)
376 sdata_info(sdata,
377 "capabilities/regulatory prevented using AP HT/VHT configuration, downgraded\n");
378
379 WARN_ON_ONCE(!cfg80211_chandef_valid(chandef));
380 return ret;
381 }
382
383 static int ieee80211_config_bw(struct ieee80211_sub_if_data *sdata,
384 struct sta_info *sta,
385 const struct ieee80211_ht_operation *ht_oper,
386 const struct ieee80211_vht_operation *vht_oper,
387 const u8 *bssid, u32 *changed)
388 {
389 struct ieee80211_local *local = sdata->local;
390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
391 struct ieee80211_supported_band *sband;
392 struct ieee80211_channel *chan;
393 struct cfg80211_chan_def chandef;
394 u16 ht_opmode;
395 u32 flags;
396 enum ieee80211_sta_rx_bandwidth new_sta_bw;
397 int ret;
398
399 /* if HT was/is disabled, don't track any bandwidth changes */
400 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT || !ht_oper)
401 return 0;
402
403 /* don't check VHT if we associated as non-VHT station */
404 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
405 vht_oper = NULL;
406
407 if (WARN_ON_ONCE(!sta))
408 return -EINVAL;
409
410 chan = sdata->vif.bss_conf.chandef.chan;
411 sband = local->hw.wiphy->bands[chan->band];
412
413 /* calculate new channel (type) based on HT/VHT operation IEs */
414 flags = ieee80211_determine_chantype(sdata, sband, chan, ht_oper,
415 vht_oper, &chandef, false);
416
417 /*
418 * Downgrade the new channel if we associated with restricted
419 * capabilities. For example, if we associated as a 20 MHz STA
420 * to a 40 MHz AP (due to regulatory, capabilities or config
421 * reasons) then switching to a 40 MHz channel now won't do us
422 * any good -- we couldn't use it with the AP.
423 */
424 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
425 chandef.width == NL80211_CHAN_WIDTH_80P80)
426 flags |= chandef_downgrade(&chandef);
427 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
428 chandef.width == NL80211_CHAN_WIDTH_160)
429 flags |= chandef_downgrade(&chandef);
430 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
431 chandef.width > NL80211_CHAN_WIDTH_20)
432 flags |= chandef_downgrade(&chandef);
433
434 if (cfg80211_chandef_identical(&chandef, &sdata->vif.bss_conf.chandef))
435 return 0;
436
437 sdata_info(sdata,
438 "AP %pM changed bandwidth, new config is %d MHz, width %d (%d/%d MHz)\n",
439 ifmgd->bssid, chandef.chan->center_freq, chandef.width,
440 chandef.center_freq1, chandef.center_freq2);
441
442 if (flags != (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
443 IEEE80211_STA_DISABLE_VHT |
444 IEEE80211_STA_DISABLE_40MHZ |
445 IEEE80211_STA_DISABLE_80P80MHZ |
446 IEEE80211_STA_DISABLE_160MHZ)) ||
447 !cfg80211_chandef_valid(&chandef)) {
448 sdata_info(sdata,
449 "AP %pM changed bandwidth in a way we can't support - disconnect\n",
450 ifmgd->bssid);
451 return -EINVAL;
452 }
453
454 switch (chandef.width) {
455 case NL80211_CHAN_WIDTH_20_NOHT:
456 case NL80211_CHAN_WIDTH_20:
457 new_sta_bw = IEEE80211_STA_RX_BW_20;
458 break;
459 case NL80211_CHAN_WIDTH_40:
460 new_sta_bw = IEEE80211_STA_RX_BW_40;
461 break;
462 case NL80211_CHAN_WIDTH_80:
463 new_sta_bw = IEEE80211_STA_RX_BW_80;
464 break;
465 case NL80211_CHAN_WIDTH_80P80:
466 case NL80211_CHAN_WIDTH_160:
467 new_sta_bw = IEEE80211_STA_RX_BW_160;
468 break;
469 default:
470 return -EINVAL;
471 }
472
473 if (new_sta_bw > sta->cur_max_bandwidth)
474 new_sta_bw = sta->cur_max_bandwidth;
475
476 if (new_sta_bw < sta->sta.bandwidth) {
477 sta->sta.bandwidth = new_sta_bw;
478 rate_control_rate_update(local, sband, sta,
479 IEEE80211_RC_BW_CHANGED);
480 }
481
482 ret = ieee80211_vif_change_bandwidth(sdata, &chandef, changed);
483 if (ret) {
484 sdata_info(sdata,
485 "AP %pM changed bandwidth to incompatible one - disconnect\n",
486 ifmgd->bssid);
487 return ret;
488 }
489
490 if (new_sta_bw > sta->sta.bandwidth) {
491 sta->sta.bandwidth = new_sta_bw;
492 rate_control_rate_update(local, sband, sta,
493 IEEE80211_RC_BW_CHANGED);
494 }
495
496 ht_opmode = le16_to_cpu(ht_oper->operation_mode);
497
498 /* if bss configuration changed store the new one */
499 if (sdata->vif.bss_conf.ht_operation_mode != ht_opmode) {
500 *changed |= BSS_CHANGED_HT;
501 sdata->vif.bss_conf.ht_operation_mode = ht_opmode;
502 }
503
504 return 0;
505 }
506
507 /* frame sending functions */
508
509 static int ieee80211_compatible_rates(const u8 *supp_rates, int supp_rates_len,
510 struct ieee80211_supported_band *sband,
511 u32 *rates)
512 {
513 int i, j, count;
514 *rates = 0;
515 count = 0;
516 for (i = 0; i < supp_rates_len; i++) {
517 int rate = (supp_rates[i] & 0x7F) * 5;
518
519 for (j = 0; j < sband->n_bitrates; j++)
520 if (sband->bitrates[j].bitrate == rate) {
521 *rates |= BIT(j);
522 count++;
523 break;
524 }
525 }
526
527 return count;
528 }
529
530 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata,
531 struct sk_buff *skb, u8 ap_ht_param,
532 struct ieee80211_supported_band *sband,
533 struct ieee80211_channel *channel,
534 enum ieee80211_smps_mode smps)
535 {
536 u8 *pos;
537 u32 flags = channel->flags;
538 u16 cap;
539 struct ieee80211_sta_ht_cap ht_cap;
540
541 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap));
542
543 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap));
544 ieee80211_apply_htcap_overrides(sdata, &ht_cap);
545
546 /* determine capability flags */
547 cap = ht_cap.cap;
548
549 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
550 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
551 if (flags & IEEE80211_CHAN_NO_HT40PLUS) {
552 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
553 cap &= ~IEEE80211_HT_CAP_SGI_40;
554 }
555 break;
556 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
557 if (flags & IEEE80211_CHAN_NO_HT40MINUS) {
558 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
559 cap &= ~IEEE80211_HT_CAP_SGI_40;
560 }
561 break;
562 }
563
564 /*
565 * If 40 MHz was disabled associate as though we weren't
566 * capable of 40 MHz -- some broken APs will never fall
567 * back to trying to transmit in 20 MHz.
568 */
569 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_40MHZ) {
570 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40;
571 cap &= ~IEEE80211_HT_CAP_SGI_40;
572 }
573
574 /* set SM PS mode properly */
575 cap &= ~IEEE80211_HT_CAP_SM_PS;
576 switch (smps) {
577 case IEEE80211_SMPS_AUTOMATIC:
578 case IEEE80211_SMPS_NUM_MODES:
579 WARN_ON(1);
580 case IEEE80211_SMPS_OFF:
581 cap |= WLAN_HT_CAP_SM_PS_DISABLED <<
582 IEEE80211_HT_CAP_SM_PS_SHIFT;
583 break;
584 case IEEE80211_SMPS_STATIC:
585 cap |= WLAN_HT_CAP_SM_PS_STATIC <<
586 IEEE80211_HT_CAP_SM_PS_SHIFT;
587 break;
588 case IEEE80211_SMPS_DYNAMIC:
589 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC <<
590 IEEE80211_HT_CAP_SM_PS_SHIFT;
591 break;
592 }
593
594 /* reserve and fill IE */
595 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2);
596 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap);
597 }
598
599 static void ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata,
600 struct sk_buff *skb,
601 struct ieee80211_supported_band *sband,
602 struct ieee80211_vht_cap *ap_vht_cap)
603 {
604 u8 *pos;
605 u32 cap;
606 struct ieee80211_sta_vht_cap vht_cap;
607
608 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap));
609
610 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap));
611 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap);
612
613 /* determine capability flags */
614 cap = vht_cap.cap;
615
616 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_80P80MHZ) {
617 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ;
618 cap |= IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
619 }
620
621 if (sdata->u.mgd.flags & IEEE80211_STA_DISABLE_160MHZ) {
622 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160;
623 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ;
624 }
625
626 /*
627 * Some APs apparently get confused if our capabilities are better
628 * than theirs, so restrict what we advertise in the assoc request.
629 */
630 if (!(ap_vht_cap->vht_cap_info &
631 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE)))
632 cap &= ~IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE;
633
634 /* reserve and fill IE */
635 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2);
636 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap);
637 }
638
639 static void ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata)
640 {
641 struct ieee80211_local *local = sdata->local;
642 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
643 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
644 struct sk_buff *skb;
645 struct ieee80211_mgmt *mgmt;
646 u8 *pos, qos_info;
647 size_t offset = 0, noffset;
648 int i, count, rates_len, supp_rates_len;
649 u16 capab;
650 struct ieee80211_supported_band *sband;
651 struct ieee80211_chanctx_conf *chanctx_conf;
652 struct ieee80211_channel *chan;
653 u32 rates = 0;
654
655 lockdep_assert_held(&ifmgd->mtx);
656
657 rcu_read_lock();
658 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
659 if (WARN_ON(!chanctx_conf)) {
660 rcu_read_unlock();
661 return;
662 }
663 chan = chanctx_conf->def.chan;
664 rcu_read_unlock();
665 sband = local->hw.wiphy->bands[chan->band];
666
667 if (assoc_data->supp_rates_len) {
668 /*
669 * Get all rates supported by the device and the AP as
670 * some APs don't like getting a superset of their rates
671 * in the association request (e.g. D-Link DAP 1353 in
672 * b-only mode)...
673 */
674 rates_len = ieee80211_compatible_rates(assoc_data->supp_rates,
675 assoc_data->supp_rates_len,
676 sband, &rates);
677 } else {
678 /*
679 * In case AP not provide any supported rates information
680 * before association, we send information element(s) with
681 * all rates that we support.
682 */
683 rates = ~0;
684 rates_len = sband->n_bitrates;
685 }
686
687 skb = alloc_skb(local->hw.extra_tx_headroom +
688 sizeof(*mgmt) + /* bit too much but doesn't matter */
689 2 + assoc_data->ssid_len + /* SSID */
690 4 + rates_len + /* (extended) rates */
691 4 + /* power capability */
692 2 + 2 * sband->n_channels + /* supported channels */
693 2 + sizeof(struct ieee80211_ht_cap) + /* HT */
694 2 + sizeof(struct ieee80211_vht_cap) + /* VHT */
695 assoc_data->ie_len + /* extra IEs */
696 9, /* WMM */
697 GFP_KERNEL);
698 if (!skb)
699 return;
700
701 skb_reserve(skb, local->hw.extra_tx_headroom);
702
703 capab = WLAN_CAPABILITY_ESS;
704
705 if (sband->band == IEEE80211_BAND_2GHZ) {
706 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE))
707 capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME;
708 if (!(local->hw.flags & IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE))
709 capab |= WLAN_CAPABILITY_SHORT_PREAMBLE;
710 }
711
712 if (assoc_data->capability & WLAN_CAPABILITY_PRIVACY)
713 capab |= WLAN_CAPABILITY_PRIVACY;
714
715 if ((assoc_data->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) &&
716 (local->hw.flags & IEEE80211_HW_SPECTRUM_MGMT))
717 capab |= WLAN_CAPABILITY_SPECTRUM_MGMT;
718
719 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
720 memset(mgmt, 0, 24);
721 memcpy(mgmt->da, assoc_data->bss->bssid, ETH_ALEN);
722 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
723 memcpy(mgmt->bssid, assoc_data->bss->bssid, ETH_ALEN);
724
725 if (!is_zero_ether_addr(assoc_data->prev_bssid)) {
726 skb_put(skb, 10);
727 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
728 IEEE80211_STYPE_REASSOC_REQ);
729 mgmt->u.reassoc_req.capab_info = cpu_to_le16(capab);
730 mgmt->u.reassoc_req.listen_interval =
731 cpu_to_le16(local->hw.conf.listen_interval);
732 memcpy(mgmt->u.reassoc_req.current_ap, assoc_data->prev_bssid,
733 ETH_ALEN);
734 } else {
735 skb_put(skb, 4);
736 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
737 IEEE80211_STYPE_ASSOC_REQ);
738 mgmt->u.assoc_req.capab_info = cpu_to_le16(capab);
739 mgmt->u.assoc_req.listen_interval =
740 cpu_to_le16(local->hw.conf.listen_interval);
741 }
742
743 /* SSID */
744 pos = skb_put(skb, 2 + assoc_data->ssid_len);
745 *pos++ = WLAN_EID_SSID;
746 *pos++ = assoc_data->ssid_len;
747 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len);
748
749 /* add all rates which were marked to be used above */
750 supp_rates_len = rates_len;
751 if (supp_rates_len > 8)
752 supp_rates_len = 8;
753
754 pos = skb_put(skb, supp_rates_len + 2);
755 *pos++ = WLAN_EID_SUPP_RATES;
756 *pos++ = supp_rates_len;
757
758 count = 0;
759 for (i = 0; i < sband->n_bitrates; i++) {
760 if (BIT(i) & rates) {
761 int rate = sband->bitrates[i].bitrate;
762 *pos++ = (u8) (rate / 5);
763 if (++count == 8)
764 break;
765 }
766 }
767
768 if (rates_len > count) {
769 pos = skb_put(skb, rates_len - count + 2);
770 *pos++ = WLAN_EID_EXT_SUPP_RATES;
771 *pos++ = rates_len - count;
772
773 for (i++; i < sband->n_bitrates; i++) {
774 if (BIT(i) & rates) {
775 int rate = sband->bitrates[i].bitrate;
776 *pos++ = (u8) (rate / 5);
777 }
778 }
779 }
780
781 if (capab & WLAN_CAPABILITY_SPECTRUM_MGMT) {
782 /* 1. power capabilities */
783 pos = skb_put(skb, 4);
784 *pos++ = WLAN_EID_PWR_CAPABILITY;
785 *pos++ = 2;
786 *pos++ = 0; /* min tx power */
787 *pos++ = chan->max_power; /* max tx power */
788
789 /* 2. supported channels */
790 /* TODO: get this in reg domain format */
791 pos = skb_put(skb, 2 * sband->n_channels + 2);
792 *pos++ = WLAN_EID_SUPPORTED_CHANNELS;
793 *pos++ = 2 * sband->n_channels;
794 for (i = 0; i < sband->n_channels; i++) {
795 *pos++ = ieee80211_frequency_to_channel(
796 sband->channels[i].center_freq);
797 *pos++ = 1; /* one channel in the subband*/
798 }
799 }
800
801 /* if present, add any custom IEs that go before HT */
802 if (assoc_data->ie_len && assoc_data->ie) {
803 static const u8 before_ht[] = {
804 WLAN_EID_SSID,
805 WLAN_EID_SUPP_RATES,
806 WLAN_EID_EXT_SUPP_RATES,
807 WLAN_EID_PWR_CAPABILITY,
808 WLAN_EID_SUPPORTED_CHANNELS,
809 WLAN_EID_RSN,
810 WLAN_EID_QOS_CAPA,
811 WLAN_EID_RRM_ENABLED_CAPABILITIES,
812 WLAN_EID_MOBILITY_DOMAIN,
813 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
814 };
815 noffset = ieee80211_ie_split(assoc_data->ie, assoc_data->ie_len,
816 before_ht, ARRAY_SIZE(before_ht),
817 offset);
818 pos = skb_put(skb, noffset - offset);
819 memcpy(pos, assoc_data->ie + offset, noffset - offset);
820 offset = noffset;
821 }
822
823 if (WARN_ON_ONCE((ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
824 !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT)))
825 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
826
827 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
828 ieee80211_add_ht_ie(sdata, skb, assoc_data->ap_ht_param,
829 sband, chan, sdata->smps_mode);
830
831 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
832 ieee80211_add_vht_ie(sdata, skb, sband,
833 &assoc_data->ap_vht_cap);
834
835 /* if present, add any custom non-vendor IEs that go after HT */
836 if (assoc_data->ie_len && assoc_data->ie) {
837 noffset = ieee80211_ie_split_vendor(assoc_data->ie,
838 assoc_data->ie_len,
839 offset);
840 pos = skb_put(skb, noffset - offset);
841 memcpy(pos, assoc_data->ie + offset, noffset - offset);
842 offset = noffset;
843 }
844
845 if (assoc_data->wmm) {
846 if (assoc_data->uapsd) {
847 qos_info = ifmgd->uapsd_queues;
848 qos_info |= (ifmgd->uapsd_max_sp_len <<
849 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT);
850 } else {
851 qos_info = 0;
852 }
853
854 pos = skb_put(skb, 9);
855 *pos++ = WLAN_EID_VENDOR_SPECIFIC;
856 *pos++ = 7; /* len */
857 *pos++ = 0x00; /* Microsoft OUI 00:50:F2 */
858 *pos++ = 0x50;
859 *pos++ = 0xf2;
860 *pos++ = 2; /* WME */
861 *pos++ = 0; /* WME info */
862 *pos++ = 1; /* WME ver */
863 *pos++ = qos_info;
864 }
865
866 /* add any remaining custom (i.e. vendor specific here) IEs */
867 if (assoc_data->ie_len && assoc_data->ie) {
868 noffset = assoc_data->ie_len;
869 pos = skb_put(skb, noffset - offset);
870 memcpy(pos, assoc_data->ie + offset, noffset - offset);
871 }
872
873 drv_mgd_prepare_tx(local, sdata);
874
875 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
876 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
877 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS |
878 IEEE80211_TX_INTFL_MLME_CONN_TX;
879 ieee80211_tx_skb(sdata, skb);
880 }
881
882 void ieee80211_send_pspoll(struct ieee80211_local *local,
883 struct ieee80211_sub_if_data *sdata)
884 {
885 struct ieee80211_pspoll *pspoll;
886 struct sk_buff *skb;
887
888 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif);
889 if (!skb)
890 return;
891
892 pspoll = (struct ieee80211_pspoll *) skb->data;
893 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
894
895 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
896 ieee80211_tx_skb(sdata, skb);
897 }
898
899 void ieee80211_send_nullfunc(struct ieee80211_local *local,
900 struct ieee80211_sub_if_data *sdata,
901 int powersave)
902 {
903 struct sk_buff *skb;
904 struct ieee80211_hdr_3addr *nullfunc;
905 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
906
907 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif);
908 if (!skb)
909 return;
910
911 nullfunc = (struct ieee80211_hdr_3addr *) skb->data;
912 if (powersave)
913 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM);
914
915 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
916 IEEE80211_TX_INTFL_OFFCHAN_TX_OK;
917 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
918 IEEE80211_STA_CONNECTION_POLL))
919 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE;
920
921 ieee80211_tx_skb(sdata, skb);
922 }
923
924 static void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local,
925 struct ieee80211_sub_if_data *sdata)
926 {
927 struct sk_buff *skb;
928 struct ieee80211_hdr *nullfunc;
929 __le16 fc;
930
931 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
932 return;
933
934 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30);
935 if (!skb)
936 return;
937
938 skb_reserve(skb, local->hw.extra_tx_headroom);
939
940 nullfunc = (struct ieee80211_hdr *) skb_put(skb, 30);
941 memset(nullfunc, 0, 30);
942 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC |
943 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS);
944 nullfunc->frame_control = fc;
945 memcpy(nullfunc->addr1, sdata->u.mgd.bssid, ETH_ALEN);
946 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN);
947 memcpy(nullfunc->addr3, sdata->u.mgd.bssid, ETH_ALEN);
948 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN);
949
950 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
951 ieee80211_tx_skb(sdata, skb);
952 }
953
954 /* spectrum management related things */
955 static void ieee80211_chswitch_work(struct work_struct *work)
956 {
957 struct ieee80211_sub_if_data *sdata =
958 container_of(work, struct ieee80211_sub_if_data, u.mgd.chswitch_work);
959 struct ieee80211_local *local = sdata->local;
960 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
961
962 if (!ieee80211_sdata_running(sdata))
963 return;
964
965 mutex_lock(&ifmgd->mtx);
966 if (!ifmgd->associated)
967 goto out;
968
969 local->_oper_chandef = local->csa_chandef;
970
971 if (!local->ops->channel_switch) {
972 /* call "hw_config" only if doing sw channel switch */
973 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
974 } else {
975 /* update the device channel directly */
976 local->hw.conf.chandef = local->_oper_chandef;
977 }
978
979 /* XXX: shouldn't really modify cfg80211-owned data! */
980 ifmgd->associated->channel = local->_oper_chandef.chan;
981
982 /* XXX: wait for a beacon first? */
983 ieee80211_wake_queues_by_reason(&local->hw,
984 IEEE80211_MAX_QUEUE_MAP,
985 IEEE80211_QUEUE_STOP_REASON_CSA);
986 out:
987 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
988 mutex_unlock(&ifmgd->mtx);
989 }
990
991 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success)
992 {
993 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
994 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
995
996 trace_api_chswitch_done(sdata, success);
997 if (!success) {
998 sdata_info(sdata,
999 "driver channel switch failed, disconnecting\n");
1000 ieee80211_queue_work(&sdata->local->hw,
1001 &ifmgd->csa_connection_drop_work);
1002 } else {
1003 ieee80211_queue_work(&sdata->local->hw, &ifmgd->chswitch_work);
1004 }
1005 }
1006 EXPORT_SYMBOL(ieee80211_chswitch_done);
1007
1008 static void ieee80211_chswitch_timer(unsigned long data)
1009 {
1010 struct ieee80211_sub_if_data *sdata =
1011 (struct ieee80211_sub_if_data *) data;
1012
1013 ieee80211_queue_work(&sdata->local->hw, &sdata->u.mgd.chswitch_work);
1014 }
1015
1016 static void
1017 ieee80211_sta_process_chanswitch(struct ieee80211_sub_if_data *sdata,
1018 u64 timestamp, struct ieee802_11_elems *elems,
1019 bool beacon)
1020 {
1021 struct ieee80211_local *local = sdata->local;
1022 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1023 struct cfg80211_bss *cbss = ifmgd->associated;
1024 struct ieee80211_bss *bss;
1025 struct ieee80211_chanctx *chanctx;
1026 enum ieee80211_band new_band;
1027 int new_freq;
1028 u8 new_chan_no;
1029 u8 count;
1030 u8 mode;
1031 struct ieee80211_channel *new_chan;
1032 struct cfg80211_chan_def new_chandef = {};
1033 struct cfg80211_chan_def new_vht_chandef = {};
1034 const struct ieee80211_sec_chan_offs_ie *sec_chan_offs;
1035 const struct ieee80211_wide_bw_chansw_ie *wide_bw_chansw_ie;
1036 const struct ieee80211_ht_operation *ht_oper;
1037 int secondary_channel_offset = -1;
1038
1039 ASSERT_MGD_MTX(ifmgd);
1040
1041 if (!cbss)
1042 return;
1043
1044 if (local->scanning)
1045 return;
1046
1047 /* disregard subsequent announcements if we are already processing */
1048 if (ifmgd->flags & IEEE80211_STA_CSA_RECEIVED)
1049 return;
1050
1051 sec_chan_offs = elems->sec_chan_offs;
1052 wide_bw_chansw_ie = elems->wide_bw_chansw_ie;
1053 ht_oper = elems->ht_operation;
1054
1055 if (ifmgd->flags & (IEEE80211_STA_DISABLE_HT |
1056 IEEE80211_STA_DISABLE_40MHZ)) {
1057 sec_chan_offs = NULL;
1058 wide_bw_chansw_ie = NULL;
1059 /* only used for bandwidth here */
1060 ht_oper = NULL;
1061 }
1062
1063 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
1064 wide_bw_chansw_ie = NULL;
1065
1066 if (elems->ext_chansw_ie) {
1067 if (!ieee80211_operating_class_to_band(
1068 elems->ext_chansw_ie->new_operating_class,
1069 &new_band)) {
1070 sdata_info(sdata,
1071 "cannot understand ECSA IE operating class %d, disconnecting\n",
1072 elems->ext_chansw_ie->new_operating_class);
1073 ieee80211_queue_work(&local->hw,
1074 &ifmgd->csa_connection_drop_work);
1075 }
1076 new_chan_no = elems->ext_chansw_ie->new_ch_num;
1077 count = elems->ext_chansw_ie->count;
1078 mode = elems->ext_chansw_ie->mode;
1079 } else if (elems->ch_switch_ie) {
1080 new_band = cbss->channel->band;
1081 new_chan_no = elems->ch_switch_ie->new_ch_num;
1082 count = elems->ch_switch_ie->count;
1083 mode = elems->ch_switch_ie->mode;
1084 } else {
1085 /* nothing here we understand */
1086 return;
1087 }
1088
1089 bss = (void *)cbss->priv;
1090
1091 new_freq = ieee80211_channel_to_frequency(new_chan_no, new_band);
1092 new_chan = ieee80211_get_channel(sdata->local->hw.wiphy, new_freq);
1093 if (!new_chan || new_chan->flags & IEEE80211_CHAN_DISABLED) {
1094 sdata_info(sdata,
1095 "AP %pM switches to unsupported channel (%d MHz), disconnecting\n",
1096 ifmgd->associated->bssid, new_freq);
1097 ieee80211_queue_work(&local->hw,
1098 &ifmgd->csa_connection_drop_work);
1099 return;
1100 }
1101
1102 if (!beacon && sec_chan_offs) {
1103 secondary_channel_offset = sec_chan_offs->sec_chan_offs;
1104 } else if (beacon && ht_oper) {
1105 secondary_channel_offset =
1106 ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET;
1107 } else if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT)) {
1108 /*
1109 * If it's not a beacon, HT is enabled and the IE not present,
1110 * it's 20 MHz, 802.11-2012 8.5.2.6:
1111 * This element [the Secondary Channel Offset Element] is
1112 * present when switching to a 40 MHz channel. It may be
1113 * present when switching to a 20 MHz channel (in which
1114 * case the secondary channel offset is set to SCN).
1115 */
1116 secondary_channel_offset = IEEE80211_HT_PARAM_CHA_SEC_NONE;
1117 }
1118
1119 switch (secondary_channel_offset) {
1120 default:
1121 /* secondary_channel_offset was present but is invalid */
1122 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
1123 cfg80211_chandef_create(&new_chandef, new_chan,
1124 NL80211_CHAN_HT20);
1125 break;
1126 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
1127 cfg80211_chandef_create(&new_chandef, new_chan,
1128 NL80211_CHAN_HT40PLUS);
1129 break;
1130 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
1131 cfg80211_chandef_create(&new_chandef, new_chan,
1132 NL80211_CHAN_HT40MINUS);
1133 break;
1134 case -1:
1135 cfg80211_chandef_create(&new_chandef, new_chan,
1136 NL80211_CHAN_NO_HT);
1137 break;
1138 }
1139
1140 if (wide_bw_chansw_ie) {
1141 new_vht_chandef.chan = new_chan;
1142 new_vht_chandef.center_freq1 =
1143 ieee80211_channel_to_frequency(
1144 wide_bw_chansw_ie->new_center_freq_seg0,
1145 new_band);
1146
1147 switch (wide_bw_chansw_ie->new_channel_width) {
1148 default:
1149 /* hmmm, ignore VHT and use HT if present */
1150 case IEEE80211_VHT_CHANWIDTH_USE_HT:
1151 new_vht_chandef.chan = NULL;
1152 break;
1153 case IEEE80211_VHT_CHANWIDTH_80MHZ:
1154 new_vht_chandef.width = NL80211_CHAN_WIDTH_80;
1155 break;
1156 case IEEE80211_VHT_CHANWIDTH_160MHZ:
1157 new_vht_chandef.width = NL80211_CHAN_WIDTH_160;
1158 break;
1159 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
1160 /* field is otherwise reserved */
1161 new_vht_chandef.center_freq2 =
1162 ieee80211_channel_to_frequency(
1163 wide_bw_chansw_ie->new_center_freq_seg1,
1164 new_band);
1165 new_vht_chandef.width = NL80211_CHAN_WIDTH_80P80;
1166 break;
1167 }
1168 if (ifmgd->flags & IEEE80211_STA_DISABLE_80P80MHZ &&
1169 new_vht_chandef.width == NL80211_CHAN_WIDTH_80P80)
1170 chandef_downgrade(&new_vht_chandef);
1171 if (ifmgd->flags & IEEE80211_STA_DISABLE_160MHZ &&
1172 new_vht_chandef.width == NL80211_CHAN_WIDTH_160)
1173 chandef_downgrade(&new_vht_chandef);
1174 if (ifmgd->flags & IEEE80211_STA_DISABLE_40MHZ &&
1175 new_vht_chandef.width > NL80211_CHAN_WIDTH_20)
1176 chandef_downgrade(&new_vht_chandef);
1177 }
1178
1179 /* if VHT data is there validate & use it */
1180 if (new_vht_chandef.chan) {
1181 if (!cfg80211_chandef_compatible(&new_vht_chandef,
1182 &new_chandef)) {
1183 sdata_info(sdata,
1184 "AP %pM CSA has inconsistent channel data, disconnecting\n",
1185 ifmgd->associated->bssid);
1186 ieee80211_queue_work(&local->hw,
1187 &ifmgd->csa_connection_drop_work);
1188 return;
1189 }
1190 new_chandef = new_vht_chandef;
1191 }
1192
1193 if (!cfg80211_chandef_usable(local->hw.wiphy, &new_chandef,
1194 IEEE80211_CHAN_DISABLED)) {
1195 sdata_info(sdata,
1196 "AP %pM switches to unsupported channel (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n",
1197 ifmgd->associated->bssid, new_freq,
1198 new_chandef.width, new_chandef.center_freq1,
1199 new_chandef.center_freq2);
1200 ieee80211_queue_work(&local->hw,
1201 &ifmgd->csa_connection_drop_work);
1202 return;
1203 }
1204
1205 ifmgd->flags |= IEEE80211_STA_CSA_RECEIVED;
1206
1207 if (local->use_chanctx) {
1208 sdata_info(sdata,
1209 "not handling channel switch with channel contexts\n");
1210 ieee80211_queue_work(&local->hw,
1211 &ifmgd->csa_connection_drop_work);
1212 return;
1213 }
1214
1215 mutex_lock(&local->chanctx_mtx);
1216 if (WARN_ON(!rcu_access_pointer(sdata->vif.chanctx_conf))) {
1217 mutex_unlock(&local->chanctx_mtx);
1218 return;
1219 }
1220 chanctx = container_of(rcu_access_pointer(sdata->vif.chanctx_conf),
1221 struct ieee80211_chanctx, conf);
1222 if (chanctx->refcount > 1) {
1223 sdata_info(sdata,
1224 "channel switch with multiple interfaces on the same channel, disconnecting\n");
1225 ieee80211_queue_work(&local->hw,
1226 &ifmgd->csa_connection_drop_work);
1227 mutex_unlock(&local->chanctx_mtx);
1228 return;
1229 }
1230 mutex_unlock(&local->chanctx_mtx);
1231
1232 local->csa_chandef = new_chandef;
1233
1234 if (mode)
1235 ieee80211_stop_queues_by_reason(&local->hw,
1236 IEEE80211_MAX_QUEUE_MAP,
1237 IEEE80211_QUEUE_STOP_REASON_CSA);
1238
1239 if (local->ops->channel_switch) {
1240 /* use driver's channel switch callback */
1241 struct ieee80211_channel_switch ch_switch = {
1242 .timestamp = timestamp,
1243 .block_tx = mode,
1244 .chandef = new_chandef,
1245 .count = count,
1246 };
1247
1248 drv_channel_switch(local, &ch_switch);
1249 return;
1250 }
1251
1252 /* channel switch handled in software */
1253 if (count <= 1)
1254 ieee80211_queue_work(&local->hw, &ifmgd->chswitch_work);
1255 else
1256 mod_timer(&ifmgd->chswitch_timer,
1257 TU_TO_EXP_TIME(count * cbss->beacon_interval));
1258 }
1259
1260 static u32 ieee80211_handle_pwr_constr(struct ieee80211_sub_if_data *sdata,
1261 struct ieee80211_channel *channel,
1262 const u8 *country_ie, u8 country_ie_len,
1263 const u8 *pwr_constr_elem)
1264 {
1265 struct ieee80211_country_ie_triplet *triplet;
1266 int chan = ieee80211_frequency_to_channel(channel->center_freq);
1267 int i, chan_pwr, chan_increment, new_ap_level;
1268 bool have_chan_pwr = false;
1269
1270 /* Invalid IE */
1271 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN)
1272 return 0;
1273
1274 triplet = (void *)(country_ie + 3);
1275 country_ie_len -= 3;
1276
1277 switch (channel->band) {
1278 default:
1279 WARN_ON_ONCE(1);
1280 /* fall through */
1281 case IEEE80211_BAND_2GHZ:
1282 case IEEE80211_BAND_60GHZ:
1283 chan_increment = 1;
1284 break;
1285 case IEEE80211_BAND_5GHZ:
1286 chan_increment = 4;
1287 break;
1288 }
1289
1290 /* find channel */
1291 while (country_ie_len >= 3) {
1292 u8 first_channel = triplet->chans.first_channel;
1293
1294 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID)
1295 goto next;
1296
1297 for (i = 0; i < triplet->chans.num_channels; i++) {
1298 if (first_channel + i * chan_increment == chan) {
1299 have_chan_pwr = true;
1300 chan_pwr = triplet->chans.max_power;
1301 break;
1302 }
1303 }
1304 if (have_chan_pwr)
1305 break;
1306
1307 next:
1308 triplet++;
1309 country_ie_len -= 3;
1310 }
1311
1312 if (!have_chan_pwr)
1313 return 0;
1314
1315 new_ap_level = max_t(int, 0, chan_pwr - *pwr_constr_elem);
1316
1317 if (sdata->ap_power_level == new_ap_level)
1318 return 0;
1319
1320 sdata_info(sdata,
1321 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n",
1322 new_ap_level, chan_pwr, *pwr_constr_elem,
1323 sdata->u.mgd.bssid);
1324 sdata->ap_power_level = new_ap_level;
1325 if (__ieee80211_recalc_txpower(sdata))
1326 return BSS_CHANGED_TXPOWER;
1327 return 0;
1328 }
1329
1330 /* powersave */
1331 static void ieee80211_enable_ps(struct ieee80211_local *local,
1332 struct ieee80211_sub_if_data *sdata)
1333 {
1334 struct ieee80211_conf *conf = &local->hw.conf;
1335
1336 /*
1337 * If we are scanning right now then the parameters will
1338 * take effect when scan finishes.
1339 */
1340 if (local->scanning)
1341 return;
1342
1343 if (conf->dynamic_ps_timeout > 0 &&
1344 !(local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_PS)) {
1345 mod_timer(&local->dynamic_ps_timer, jiffies +
1346 msecs_to_jiffies(conf->dynamic_ps_timeout));
1347 } else {
1348 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)
1349 ieee80211_send_nullfunc(local, sdata, 1);
1350
1351 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1352 (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS))
1353 return;
1354
1355 conf->flags |= IEEE80211_CONF_PS;
1356 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1357 }
1358 }
1359
1360 static void ieee80211_change_ps(struct ieee80211_local *local)
1361 {
1362 struct ieee80211_conf *conf = &local->hw.conf;
1363
1364 if (local->ps_sdata) {
1365 ieee80211_enable_ps(local, local->ps_sdata);
1366 } else if (conf->flags & IEEE80211_CONF_PS) {
1367 conf->flags &= ~IEEE80211_CONF_PS;
1368 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1369 del_timer_sync(&local->dynamic_ps_timer);
1370 cancel_work_sync(&local->dynamic_ps_enable_work);
1371 }
1372 }
1373
1374 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata)
1375 {
1376 struct ieee80211_if_managed *mgd = &sdata->u.mgd;
1377 struct sta_info *sta = NULL;
1378 bool authorized = false;
1379
1380 if (!mgd->powersave)
1381 return false;
1382
1383 if (mgd->broken_ap)
1384 return false;
1385
1386 if (!mgd->associated)
1387 return false;
1388
1389 if (mgd->flags & (IEEE80211_STA_BEACON_POLL |
1390 IEEE80211_STA_CONNECTION_POLL))
1391 return false;
1392
1393 rcu_read_lock();
1394 sta = sta_info_get(sdata, mgd->bssid);
1395 if (sta)
1396 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED);
1397 rcu_read_unlock();
1398
1399 return authorized;
1400 }
1401
1402 /* need to hold RTNL or interface lock */
1403 void ieee80211_recalc_ps(struct ieee80211_local *local, s32 latency)
1404 {
1405 struct ieee80211_sub_if_data *sdata, *found = NULL;
1406 int count = 0;
1407 int timeout;
1408
1409 if (!(local->hw.flags & IEEE80211_HW_SUPPORTS_PS)) {
1410 local->ps_sdata = NULL;
1411 return;
1412 }
1413
1414 list_for_each_entry(sdata, &local->interfaces, list) {
1415 if (!ieee80211_sdata_running(sdata))
1416 continue;
1417 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1418 /* If an AP vif is found, then disable PS
1419 * by setting the count to zero thereby setting
1420 * ps_sdata to NULL.
1421 */
1422 count = 0;
1423 break;
1424 }
1425 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1426 continue;
1427 found = sdata;
1428 count++;
1429 }
1430
1431 if (count == 1 && ieee80211_powersave_allowed(found)) {
1432 s32 beaconint_us;
1433
1434 if (latency < 0)
1435 latency = pm_qos_request(PM_QOS_NETWORK_LATENCY);
1436
1437 beaconint_us = ieee80211_tu_to_usec(
1438 found->vif.bss_conf.beacon_int);
1439
1440 timeout = local->dynamic_ps_forced_timeout;
1441 if (timeout < 0) {
1442 /*
1443 * Go to full PSM if the user configures a very low
1444 * latency requirement.
1445 * The 2000 second value is there for compatibility
1446 * until the PM_QOS_NETWORK_LATENCY is configured
1447 * with real values.
1448 */
1449 if (latency > (1900 * USEC_PER_MSEC) &&
1450 latency != (2000 * USEC_PER_SEC))
1451 timeout = 0;
1452 else
1453 timeout = 100;
1454 }
1455 local->hw.conf.dynamic_ps_timeout = timeout;
1456
1457 if (beaconint_us > latency) {
1458 local->ps_sdata = NULL;
1459 } else {
1460 int maxslp = 1;
1461 u8 dtimper = found->u.mgd.dtim_period;
1462
1463 /* If the TIM IE is invalid, pretend the value is 1 */
1464 if (!dtimper)
1465 dtimper = 1;
1466 else if (dtimper > 1)
1467 maxslp = min_t(int, dtimper,
1468 latency / beaconint_us);
1469
1470 local->hw.conf.max_sleep_period = maxslp;
1471 local->hw.conf.ps_dtim_period = dtimper;
1472 local->ps_sdata = found;
1473 }
1474 } else {
1475 local->ps_sdata = NULL;
1476 }
1477
1478 ieee80211_change_ps(local);
1479 }
1480
1481 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata)
1482 {
1483 bool ps_allowed = ieee80211_powersave_allowed(sdata);
1484
1485 if (sdata->vif.bss_conf.ps != ps_allowed) {
1486 sdata->vif.bss_conf.ps = ps_allowed;
1487 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_PS);
1488 }
1489 }
1490
1491 void ieee80211_dynamic_ps_disable_work(struct work_struct *work)
1492 {
1493 struct ieee80211_local *local =
1494 container_of(work, struct ieee80211_local,
1495 dynamic_ps_disable_work);
1496
1497 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1498 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1499 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1500 }
1501
1502 ieee80211_wake_queues_by_reason(&local->hw,
1503 IEEE80211_MAX_QUEUE_MAP,
1504 IEEE80211_QUEUE_STOP_REASON_PS);
1505 }
1506
1507 void ieee80211_dynamic_ps_enable_work(struct work_struct *work)
1508 {
1509 struct ieee80211_local *local =
1510 container_of(work, struct ieee80211_local,
1511 dynamic_ps_enable_work);
1512 struct ieee80211_sub_if_data *sdata = local->ps_sdata;
1513 struct ieee80211_if_managed *ifmgd;
1514 unsigned long flags;
1515 int q;
1516
1517 /* can only happen when PS was just disabled anyway */
1518 if (!sdata)
1519 return;
1520
1521 ifmgd = &sdata->u.mgd;
1522
1523 if (local->hw.conf.flags & IEEE80211_CONF_PS)
1524 return;
1525
1526 if (local->hw.conf.dynamic_ps_timeout > 0) {
1527 /* don't enter PS if TX frames are pending */
1528 if (drv_tx_frames_pending(local)) {
1529 mod_timer(&local->dynamic_ps_timer, jiffies +
1530 msecs_to_jiffies(
1531 local->hw.conf.dynamic_ps_timeout));
1532 return;
1533 }
1534
1535 /*
1536 * transmission can be stopped by others which leads to
1537 * dynamic_ps_timer expiry. Postpone the ps timer if it
1538 * is not the actual idle state.
1539 */
1540 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
1541 for (q = 0; q < local->hw.queues; q++) {
1542 if (local->queue_stop_reasons[q]) {
1543 spin_unlock_irqrestore(&local->queue_stop_reason_lock,
1544 flags);
1545 mod_timer(&local->dynamic_ps_timer, jiffies +
1546 msecs_to_jiffies(
1547 local->hw.conf.dynamic_ps_timeout));
1548 return;
1549 }
1550 }
1551 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
1552 }
1553
1554 if ((local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) &&
1555 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1556 if (drv_tx_frames_pending(local)) {
1557 mod_timer(&local->dynamic_ps_timer, jiffies +
1558 msecs_to_jiffies(
1559 local->hw.conf.dynamic_ps_timeout));
1560 } else {
1561 ieee80211_send_nullfunc(local, sdata, 1);
1562 /* Flush to get the tx status of nullfunc frame */
1563 ieee80211_flush_queues(local, sdata);
1564 }
1565 }
1566
1567 if (!((local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) &&
1568 (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK)) ||
1569 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) {
1570 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED;
1571 local->hw.conf.flags |= IEEE80211_CONF_PS;
1572 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1573 }
1574 }
1575
1576 void ieee80211_dynamic_ps_timer(unsigned long data)
1577 {
1578 struct ieee80211_local *local = (void *) data;
1579
1580 if (local->quiescing || local->suspended)
1581 return;
1582
1583 ieee80211_queue_work(&local->hw, &local->dynamic_ps_enable_work);
1584 }
1585
1586 void ieee80211_dfs_cac_timer_work(struct work_struct *work)
1587 {
1588 struct delayed_work *delayed_work =
1589 container_of(work, struct delayed_work, work);
1590 struct ieee80211_sub_if_data *sdata =
1591 container_of(delayed_work, struct ieee80211_sub_if_data,
1592 dfs_cac_timer_work);
1593
1594 ieee80211_vif_release_channel(sdata);
1595
1596 cfg80211_cac_event(sdata->dev, NL80211_RADAR_CAC_FINISHED, GFP_KERNEL);
1597 }
1598
1599 /* MLME */
1600 static bool ieee80211_sta_wmm_params(struct ieee80211_local *local,
1601 struct ieee80211_sub_if_data *sdata,
1602 const u8 *wmm_param, size_t wmm_param_len)
1603 {
1604 struct ieee80211_tx_queue_params params;
1605 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1606 size_t left;
1607 int count;
1608 const u8 *pos;
1609 u8 uapsd_queues = 0;
1610
1611 if (!local->ops->conf_tx)
1612 return false;
1613
1614 if (local->hw.queues < IEEE80211_NUM_ACS)
1615 return false;
1616
1617 if (!wmm_param)
1618 return false;
1619
1620 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1)
1621 return false;
1622
1623 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED)
1624 uapsd_queues = ifmgd->uapsd_queues;
1625
1626 count = wmm_param[6] & 0x0f;
1627 if (count == ifmgd->wmm_last_param_set)
1628 return false;
1629 ifmgd->wmm_last_param_set = count;
1630
1631 pos = wmm_param + 8;
1632 left = wmm_param_len - 8;
1633
1634 memset(&params, 0, sizeof(params));
1635
1636 sdata->wmm_acm = 0;
1637 for (; left >= 4; left -= 4, pos += 4) {
1638 int aci = (pos[0] >> 5) & 0x03;
1639 int acm = (pos[0] >> 4) & 0x01;
1640 bool uapsd = false;
1641 int queue;
1642
1643 switch (aci) {
1644 case 1: /* AC_BK */
1645 queue = 3;
1646 if (acm)
1647 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */
1648 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK)
1649 uapsd = true;
1650 break;
1651 case 2: /* AC_VI */
1652 queue = 1;
1653 if (acm)
1654 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */
1655 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI)
1656 uapsd = true;
1657 break;
1658 case 3: /* AC_VO */
1659 queue = 0;
1660 if (acm)
1661 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */
1662 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO)
1663 uapsd = true;
1664 break;
1665 case 0: /* AC_BE */
1666 default:
1667 queue = 2;
1668 if (acm)
1669 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */
1670 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE)
1671 uapsd = true;
1672 break;
1673 }
1674
1675 params.aifs = pos[0] & 0x0f;
1676 params.cw_max = ecw2cw((pos[1] & 0xf0) >> 4);
1677 params.cw_min = ecw2cw(pos[1] & 0x0f);
1678 params.txop = get_unaligned_le16(pos + 2);
1679 params.acm = acm;
1680 params.uapsd = uapsd;
1681
1682 mlme_dbg(sdata,
1683 "WMM queue=%d aci=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d\n",
1684 queue, aci, acm,
1685 params.aifs, params.cw_min, params.cw_max,
1686 params.txop, params.uapsd);
1687 sdata->tx_conf[queue] = params;
1688 if (drv_conf_tx(local, sdata, queue, &params))
1689 sdata_err(sdata,
1690 "failed to set TX queue parameters for queue %d\n",
1691 queue);
1692 }
1693
1694 /* enable WMM or activate new settings */
1695 sdata->vif.bss_conf.qos = true;
1696 return true;
1697 }
1698
1699 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1700 {
1701 lockdep_assert_held(&sdata->local->mtx);
1702
1703 sdata->u.mgd.flags &= ~(IEEE80211_STA_CONNECTION_POLL |
1704 IEEE80211_STA_BEACON_POLL);
1705 ieee80211_run_deferred_scan(sdata->local);
1706 }
1707
1708 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata)
1709 {
1710 mutex_lock(&sdata->local->mtx);
1711 __ieee80211_stop_poll(sdata);
1712 mutex_unlock(&sdata->local->mtx);
1713 }
1714
1715 static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
1716 u16 capab, bool erp_valid, u8 erp)
1717 {
1718 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1719 u32 changed = 0;
1720 bool use_protection;
1721 bool use_short_preamble;
1722 bool use_short_slot;
1723
1724 if (erp_valid) {
1725 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0;
1726 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0;
1727 } else {
1728 use_protection = false;
1729 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE);
1730 }
1731
1732 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
1733 if (ieee80211_get_sdata_band(sdata) == IEEE80211_BAND_5GHZ)
1734 use_short_slot = true;
1735
1736 if (use_protection != bss_conf->use_cts_prot) {
1737 bss_conf->use_cts_prot = use_protection;
1738 changed |= BSS_CHANGED_ERP_CTS_PROT;
1739 }
1740
1741 if (use_short_preamble != bss_conf->use_short_preamble) {
1742 bss_conf->use_short_preamble = use_short_preamble;
1743 changed |= BSS_CHANGED_ERP_PREAMBLE;
1744 }
1745
1746 if (use_short_slot != bss_conf->use_short_slot) {
1747 bss_conf->use_short_slot = use_short_slot;
1748 changed |= BSS_CHANGED_ERP_SLOT;
1749 }
1750
1751 return changed;
1752 }
1753
1754 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata,
1755 struct cfg80211_bss *cbss,
1756 u32 bss_info_changed)
1757 {
1758 struct ieee80211_bss *bss = (void *)cbss->priv;
1759 struct ieee80211_local *local = sdata->local;
1760 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
1761
1762 bss_info_changed |= BSS_CHANGED_ASSOC;
1763 bss_info_changed |= ieee80211_handle_bss_capability(sdata,
1764 bss_conf->assoc_capability, bss->has_erp_value, bss->erp_value);
1765
1766 sdata->u.mgd.beacon_timeout = usecs_to_jiffies(ieee80211_tu_to_usec(
1767 beacon_loss_count * bss_conf->beacon_int));
1768
1769 sdata->u.mgd.associated = cbss;
1770 memcpy(sdata->u.mgd.bssid, cbss->bssid, ETH_ALEN);
1771
1772 sdata->u.mgd.flags |= IEEE80211_STA_RESET_SIGNAL_AVE;
1773
1774 if (sdata->vif.p2p) {
1775 const struct cfg80211_bss_ies *ies;
1776
1777 rcu_read_lock();
1778 ies = rcu_dereference(cbss->ies);
1779 if (ies) {
1780 int ret;
1781
1782 ret = cfg80211_get_p2p_attr(
1783 ies->data, ies->len,
1784 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
1785 (u8 *) &bss_conf->p2p_noa_attr,
1786 sizeof(bss_conf->p2p_noa_attr));
1787 if (ret >= 2) {
1788 sdata->u.mgd.p2p_noa_index =
1789 bss_conf->p2p_noa_attr.index;
1790 bss_info_changed |= BSS_CHANGED_P2P_PS;
1791 }
1792 }
1793 rcu_read_unlock();
1794 }
1795
1796 /* just to be sure */
1797 ieee80211_stop_poll(sdata);
1798
1799 ieee80211_led_assoc(local, 1);
1800
1801 if (sdata->u.mgd.assoc_data->have_beacon) {
1802 /*
1803 * If the AP is buggy we may get here with no DTIM period
1804 * known, so assume it's 1 which is the only safe assumption
1805 * in that case, although if the TIM IE is broken powersave
1806 * probably just won't work at all.
1807 */
1808 bss_conf->dtim_period = sdata->u.mgd.dtim_period ?: 1;
1809 bss_info_changed |= BSS_CHANGED_DTIM_PERIOD;
1810 } else {
1811 bss_conf->dtim_period = 0;
1812 }
1813
1814 bss_conf->assoc = 1;
1815
1816 /* Tell the driver to monitor connection quality (if supported) */
1817 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI &&
1818 bss_conf->cqm_rssi_thold)
1819 bss_info_changed |= BSS_CHANGED_CQM;
1820
1821 /* Enable ARP filtering */
1822 if (bss_conf->arp_addr_cnt)
1823 bss_info_changed |= BSS_CHANGED_ARP_FILTER;
1824
1825 ieee80211_bss_info_change_notify(sdata, bss_info_changed);
1826
1827 mutex_lock(&local->iflist_mtx);
1828 ieee80211_recalc_ps(local, -1);
1829 mutex_unlock(&local->iflist_mtx);
1830
1831 ieee80211_recalc_smps(sdata);
1832 ieee80211_recalc_ps_vif(sdata);
1833
1834 netif_carrier_on(sdata->dev);
1835 }
1836
1837 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata,
1838 u16 stype, u16 reason, bool tx,
1839 u8 *frame_buf)
1840 {
1841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1842 struct ieee80211_local *local = sdata->local;
1843 u32 changed = 0;
1844
1845 ASSERT_MGD_MTX(ifmgd);
1846
1847 if (WARN_ON_ONCE(tx && !frame_buf))
1848 return;
1849
1850 if (WARN_ON(!ifmgd->associated))
1851 return;
1852
1853 ieee80211_stop_poll(sdata);
1854
1855 ifmgd->associated = NULL;
1856 netif_carrier_off(sdata->dev);
1857
1858 /*
1859 * if we want to get out of ps before disassoc (why?) we have
1860 * to do it before sending disassoc, as otherwise the null-packet
1861 * won't be valid.
1862 */
1863 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
1864 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
1865 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS);
1866 }
1867 local->ps_sdata = NULL;
1868
1869 /* disable per-vif ps */
1870 ieee80211_recalc_ps_vif(sdata);
1871
1872 /* flush out any pending frame (e.g. DELBA) before deauth/disassoc */
1873 if (tx)
1874 ieee80211_flush_queues(local, sdata);
1875
1876 /* deauthenticate/disassociate now */
1877 if (tx || frame_buf)
1878 ieee80211_send_deauth_disassoc(sdata, ifmgd->bssid, stype,
1879 reason, tx, frame_buf);
1880
1881 /* flush out frame */
1882 if (tx)
1883 ieee80211_flush_queues(local, sdata);
1884
1885 /* clear bssid only after building the needed mgmt frames */
1886 memset(ifmgd->bssid, 0, ETH_ALEN);
1887
1888 /* remove AP and TDLS peers */
1889 sta_info_flush_defer(sdata);
1890
1891 /* finally reset all BSS / config parameters */
1892 changed |= ieee80211_reset_erp_info(sdata);
1893
1894 ieee80211_led_assoc(local, 0);
1895 changed |= BSS_CHANGED_ASSOC;
1896 sdata->vif.bss_conf.assoc = false;
1897
1898 ifmgd->p2p_noa_index = -1;
1899 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0,
1900 sizeof(sdata->vif.bss_conf.p2p_noa_attr));
1901
1902 /* on the next assoc, re-program HT/VHT parameters */
1903 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa));
1904 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask));
1905 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa));
1906 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask));
1907
1908 sdata->ap_power_level = IEEE80211_UNSET_POWER_LEVEL;
1909
1910 del_timer_sync(&local->dynamic_ps_timer);
1911 cancel_work_sync(&local->dynamic_ps_enable_work);
1912
1913 /* Disable ARP filtering */
1914 if (sdata->vif.bss_conf.arp_addr_cnt)
1915 changed |= BSS_CHANGED_ARP_FILTER;
1916
1917 sdata->vif.bss_conf.qos = false;
1918 changed |= BSS_CHANGED_QOS;
1919
1920 /* The BSSID (not really interesting) and HT changed */
1921 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT;
1922 ieee80211_bss_info_change_notify(sdata, changed);
1923
1924 /* disassociated - set to defaults now */
1925 ieee80211_set_wmm_default(sdata, false);
1926
1927 del_timer_sync(&sdata->u.mgd.conn_mon_timer);
1928 del_timer_sync(&sdata->u.mgd.bcn_mon_timer);
1929 del_timer_sync(&sdata->u.mgd.timer);
1930 del_timer_sync(&sdata->u.mgd.chswitch_timer);
1931
1932 sdata->vif.bss_conf.dtim_period = 0;
1933
1934 ifmgd->flags = 0;
1935 ieee80211_vif_release_channel(sdata);
1936 }
1937
1938 void ieee80211_sta_rx_notify(struct ieee80211_sub_if_data *sdata,
1939 struct ieee80211_hdr *hdr)
1940 {
1941 /*
1942 * We can postpone the mgd.timer whenever receiving unicast frames
1943 * from AP because we know that the connection is working both ways
1944 * at that time. But multicast frames (and hence also beacons) must
1945 * be ignored here, because we need to trigger the timer during
1946 * data idle periods for sending the periodic probe request to the
1947 * AP we're connected to.
1948 */
1949 if (is_multicast_ether_addr(hdr->addr1))
1950 return;
1951
1952 ieee80211_sta_reset_conn_monitor(sdata);
1953 }
1954
1955 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata)
1956 {
1957 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
1958 struct ieee80211_local *local = sdata->local;
1959
1960 mutex_lock(&local->mtx);
1961 if (!(ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
1962 IEEE80211_STA_CONNECTION_POLL))) {
1963 mutex_unlock(&local->mtx);
1964 return;
1965 }
1966
1967 __ieee80211_stop_poll(sdata);
1968
1969 mutex_lock(&local->iflist_mtx);
1970 ieee80211_recalc_ps(local, -1);
1971 mutex_unlock(&local->iflist_mtx);
1972
1973 if (sdata->local->hw.flags & IEEE80211_HW_CONNECTION_MONITOR)
1974 goto out;
1975
1976 /*
1977 * We've received a probe response, but are not sure whether
1978 * we have or will be receiving any beacons or data, so let's
1979 * schedule the timers again, just in case.
1980 */
1981 ieee80211_sta_reset_beacon_monitor(sdata);
1982
1983 mod_timer(&ifmgd->conn_mon_timer,
1984 round_jiffies_up(jiffies +
1985 IEEE80211_CONNECTION_IDLE_TIME));
1986 out:
1987 mutex_unlock(&local->mtx);
1988 }
1989
1990 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata,
1991 struct ieee80211_hdr *hdr, bool ack)
1992 {
1993 if (!ieee80211_is_data(hdr->frame_control))
1994 return;
1995
1996 if (ieee80211_is_nullfunc(hdr->frame_control) &&
1997 sdata->u.mgd.probe_send_count > 0) {
1998 if (ack)
1999 ieee80211_sta_reset_conn_monitor(sdata);
2000 else
2001 sdata->u.mgd.nullfunc_failed = true;
2002 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
2003 return;
2004 }
2005
2006 if (ack)
2007 ieee80211_sta_reset_conn_monitor(sdata);
2008 }
2009
2010 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata)
2011 {
2012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2013 const u8 *ssid;
2014 u8 *dst = ifmgd->associated->bssid;
2015 u8 unicast_limit = max(1, max_probe_tries - 3);
2016
2017 /*
2018 * Try sending broadcast probe requests for the last three
2019 * probe requests after the first ones failed since some
2020 * buggy APs only support broadcast probe requests.
2021 */
2022 if (ifmgd->probe_send_count >= unicast_limit)
2023 dst = NULL;
2024
2025 /*
2026 * When the hardware reports an accurate Tx ACK status, it's
2027 * better to send a nullfunc frame instead of a probe request,
2028 * as it will kick us off the AP quickly if we aren't associated
2029 * anymore. The timeout will be reset if the frame is ACKed by
2030 * the AP.
2031 */
2032 ifmgd->probe_send_count++;
2033
2034 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
2035 ifmgd->nullfunc_failed = false;
2036 ieee80211_send_nullfunc(sdata->local, sdata, 0);
2037 } else {
2038 int ssid_len;
2039
2040 rcu_read_lock();
2041 ssid = ieee80211_bss_get_ie(ifmgd->associated, WLAN_EID_SSID);
2042 if (WARN_ON_ONCE(ssid == NULL))
2043 ssid_len = 0;
2044 else
2045 ssid_len = ssid[1];
2046
2047 ieee80211_send_probe_req(sdata, dst, ssid + 2, ssid_len, NULL,
2048 0, (u32) -1, true, 0,
2049 ifmgd->associated->channel, false);
2050 rcu_read_unlock();
2051 }
2052
2053 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms);
2054 run_again(ifmgd, ifmgd->probe_timeout);
2055 if (sdata->local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2056 ieee80211_flush_queues(sdata->local, sdata);
2057 }
2058
2059 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata,
2060 bool beacon)
2061 {
2062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2063 bool already = false;
2064
2065 if (!ieee80211_sdata_running(sdata))
2066 return;
2067
2068 mutex_lock(&ifmgd->mtx);
2069
2070 if (!ifmgd->associated)
2071 goto out;
2072
2073 mutex_lock(&sdata->local->mtx);
2074
2075 if (sdata->local->tmp_channel || sdata->local->scanning) {
2076 mutex_unlock(&sdata->local->mtx);
2077 goto out;
2078 }
2079
2080 if (beacon) {
2081 mlme_dbg_ratelimited(sdata,
2082 "detected beacon loss from AP (missed %d beacons) - probing\n",
2083 beacon_loss_count);
2084
2085 ieee80211_cqm_rssi_notify(&sdata->vif,
2086 NL80211_CQM_RSSI_BEACON_LOSS_EVENT,
2087 GFP_KERNEL);
2088 }
2089
2090 /*
2091 * The driver/our work has already reported this event or the
2092 * connection monitoring has kicked in and we have already sent
2093 * a probe request. Or maybe the AP died and the driver keeps
2094 * reporting until we disassociate...
2095 *
2096 * In either case we have to ignore the current call to this
2097 * function (except for setting the correct probe reason bit)
2098 * because otherwise we would reset the timer every time and
2099 * never check whether we received a probe response!
2100 */
2101 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
2102 IEEE80211_STA_CONNECTION_POLL))
2103 already = true;
2104
2105 if (beacon)
2106 ifmgd->flags |= IEEE80211_STA_BEACON_POLL;
2107 else
2108 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL;
2109
2110 mutex_unlock(&sdata->local->mtx);
2111
2112 if (already)
2113 goto out;
2114
2115 mutex_lock(&sdata->local->iflist_mtx);
2116 ieee80211_recalc_ps(sdata->local, -1);
2117 mutex_unlock(&sdata->local->iflist_mtx);
2118
2119 ifmgd->probe_send_count = 0;
2120 ieee80211_mgd_probe_ap_send(sdata);
2121 out:
2122 mutex_unlock(&ifmgd->mtx);
2123 }
2124
2125 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw,
2126 struct ieee80211_vif *vif)
2127 {
2128 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2129 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2130 struct cfg80211_bss *cbss;
2131 struct sk_buff *skb;
2132 const u8 *ssid;
2133 int ssid_len;
2134
2135 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2136 return NULL;
2137
2138 ASSERT_MGD_MTX(ifmgd);
2139
2140 if (ifmgd->associated)
2141 cbss = ifmgd->associated;
2142 else if (ifmgd->auth_data)
2143 cbss = ifmgd->auth_data->bss;
2144 else if (ifmgd->assoc_data)
2145 cbss = ifmgd->assoc_data->bss;
2146 else
2147 return NULL;
2148
2149 rcu_read_lock();
2150 ssid = ieee80211_bss_get_ie(cbss, WLAN_EID_SSID);
2151 if (WARN_ON_ONCE(ssid == NULL))
2152 ssid_len = 0;
2153 else
2154 ssid_len = ssid[1];
2155
2156 skb = ieee80211_build_probe_req(sdata, cbss->bssid,
2157 (u32) -1, cbss->channel,
2158 ssid + 2, ssid_len,
2159 NULL, 0, true);
2160 rcu_read_unlock();
2161
2162 return skb;
2163 }
2164 EXPORT_SYMBOL(ieee80211_ap_probereq_get);
2165
2166 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata)
2167 {
2168 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2169 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
2170
2171 mutex_lock(&ifmgd->mtx);
2172 if (!ifmgd->associated) {
2173 mutex_unlock(&ifmgd->mtx);
2174 return;
2175 }
2176
2177 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
2178 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
2179 true, frame_buf);
2180 ifmgd->flags &= ~IEEE80211_STA_CSA_RECEIVED;
2181 ieee80211_wake_queues_by_reason(&sdata->local->hw,
2182 IEEE80211_MAX_QUEUE_MAP,
2183 IEEE80211_QUEUE_STOP_REASON_CSA);
2184 mutex_unlock(&ifmgd->mtx);
2185
2186 /*
2187 * must be outside lock due to cfg80211,
2188 * but that's not a problem.
2189 */
2190 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
2191 }
2192
2193 static void ieee80211_beacon_connection_loss_work(struct work_struct *work)
2194 {
2195 struct ieee80211_sub_if_data *sdata =
2196 container_of(work, struct ieee80211_sub_if_data,
2197 u.mgd.beacon_connection_loss_work);
2198 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2199 struct sta_info *sta;
2200
2201 if (ifmgd->associated) {
2202 rcu_read_lock();
2203 sta = sta_info_get(sdata, ifmgd->bssid);
2204 if (sta)
2205 sta->beacon_loss_count++;
2206 rcu_read_unlock();
2207 }
2208
2209 if (ifmgd->connection_loss) {
2210 sdata_info(sdata, "Connection to AP %pM lost\n",
2211 ifmgd->bssid);
2212 __ieee80211_disconnect(sdata);
2213 } else {
2214 ieee80211_mgd_probe_ap(sdata, true);
2215 }
2216 }
2217
2218 static void ieee80211_csa_connection_drop_work(struct work_struct *work)
2219 {
2220 struct ieee80211_sub_if_data *sdata =
2221 container_of(work, struct ieee80211_sub_if_data,
2222 u.mgd.csa_connection_drop_work);
2223
2224 __ieee80211_disconnect(sdata);
2225 }
2226
2227 void ieee80211_beacon_loss(struct ieee80211_vif *vif)
2228 {
2229 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2230 struct ieee80211_hw *hw = &sdata->local->hw;
2231
2232 trace_api_beacon_loss(sdata);
2233
2234 sdata->u.mgd.connection_loss = false;
2235 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2236 }
2237 EXPORT_SYMBOL(ieee80211_beacon_loss);
2238
2239 void ieee80211_connection_loss(struct ieee80211_vif *vif)
2240 {
2241 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2242 struct ieee80211_hw *hw = &sdata->local->hw;
2243
2244 trace_api_connection_loss(sdata);
2245
2246 sdata->u.mgd.connection_loss = true;
2247 ieee80211_queue_work(hw, &sdata->u.mgd.beacon_connection_loss_work);
2248 }
2249 EXPORT_SYMBOL(ieee80211_connection_loss);
2250
2251
2252 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata,
2253 bool assoc)
2254 {
2255 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2256
2257 lockdep_assert_held(&sdata->u.mgd.mtx);
2258
2259 if (!assoc) {
2260 sta_info_destroy_addr(sdata, auth_data->bss->bssid);
2261
2262 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2263 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2264 sdata->u.mgd.flags = 0;
2265 ieee80211_vif_release_channel(sdata);
2266 }
2267
2268 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss);
2269 kfree(auth_data);
2270 sdata->u.mgd.auth_data = NULL;
2271 }
2272
2273 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata,
2274 struct ieee80211_mgmt *mgmt, size_t len)
2275 {
2276 struct ieee80211_local *local = sdata->local;
2277 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data;
2278 u8 *pos;
2279 struct ieee802_11_elems elems;
2280 u32 tx_flags = 0;
2281
2282 pos = mgmt->u.auth.variable;
2283 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2284 if (!elems.challenge)
2285 return;
2286 auth_data->expected_transaction = 4;
2287 drv_mgd_prepare_tx(sdata->local, sdata);
2288 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
2289 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
2290 IEEE80211_TX_INTFL_MLME_CONN_TX;
2291 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0,
2292 elems.challenge - 2, elems.challenge_len + 2,
2293 auth_data->bss->bssid, auth_data->bss->bssid,
2294 auth_data->key, auth_data->key_len,
2295 auth_data->key_idx, tx_flags);
2296 }
2297
2298 static enum rx_mgmt_action __must_check
2299 ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata,
2300 struct ieee80211_mgmt *mgmt, size_t len)
2301 {
2302 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2303 u8 bssid[ETH_ALEN];
2304 u16 auth_alg, auth_transaction, status_code;
2305 struct sta_info *sta;
2306
2307 lockdep_assert_held(&ifmgd->mtx);
2308
2309 if (len < 24 + 6)
2310 return RX_MGMT_NONE;
2311
2312 if (!ifmgd->auth_data || ifmgd->auth_data->done)
2313 return RX_MGMT_NONE;
2314
2315 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
2316
2317 if (!ether_addr_equal(bssid, mgmt->bssid))
2318 return RX_MGMT_NONE;
2319
2320 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg);
2321 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction);
2322 status_code = le16_to_cpu(mgmt->u.auth.status_code);
2323
2324 if (auth_alg != ifmgd->auth_data->algorithm ||
2325 auth_transaction != ifmgd->auth_data->expected_transaction) {
2326 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n",
2327 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm,
2328 auth_transaction,
2329 ifmgd->auth_data->expected_transaction);
2330 return RX_MGMT_NONE;
2331 }
2332
2333 if (status_code != WLAN_STATUS_SUCCESS) {
2334 sdata_info(sdata, "%pM denied authentication (status %d)\n",
2335 mgmt->sa, status_code);
2336 ieee80211_destroy_auth_data(sdata, false);
2337 return RX_MGMT_CFG80211_RX_AUTH;
2338 }
2339
2340 switch (ifmgd->auth_data->algorithm) {
2341 case WLAN_AUTH_OPEN:
2342 case WLAN_AUTH_LEAP:
2343 case WLAN_AUTH_FT:
2344 case WLAN_AUTH_SAE:
2345 break;
2346 case WLAN_AUTH_SHARED_KEY:
2347 if (ifmgd->auth_data->expected_transaction != 4) {
2348 ieee80211_auth_challenge(sdata, mgmt, len);
2349 /* need another frame */
2350 return RX_MGMT_NONE;
2351 }
2352 break;
2353 default:
2354 WARN_ONCE(1, "invalid auth alg %d",
2355 ifmgd->auth_data->algorithm);
2356 return RX_MGMT_NONE;
2357 }
2358
2359 sdata_info(sdata, "authenticated\n");
2360 ifmgd->auth_data->done = true;
2361 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC;
2362 ifmgd->auth_data->timeout_started = true;
2363 run_again(ifmgd, ifmgd->auth_data->timeout);
2364
2365 if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE &&
2366 ifmgd->auth_data->expected_transaction != 2) {
2367 /*
2368 * Report auth frame to user space for processing since another
2369 * round of Authentication frames is still needed.
2370 */
2371 return RX_MGMT_CFG80211_RX_AUTH;
2372 }
2373
2374 /* move station state to auth */
2375 mutex_lock(&sdata->local->sta_mtx);
2376 sta = sta_info_get(sdata, bssid);
2377 if (!sta) {
2378 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, bssid);
2379 goto out_err;
2380 }
2381 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) {
2382 sdata_info(sdata, "failed moving %pM to auth\n", bssid);
2383 goto out_err;
2384 }
2385 mutex_unlock(&sdata->local->sta_mtx);
2386
2387 return RX_MGMT_CFG80211_RX_AUTH;
2388 out_err:
2389 mutex_unlock(&sdata->local->sta_mtx);
2390 /* ignore frame -- wait for timeout */
2391 return RX_MGMT_NONE;
2392 }
2393
2394
2395 static enum rx_mgmt_action __must_check
2396 ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata,
2397 struct ieee80211_mgmt *mgmt, size_t len)
2398 {
2399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2400 const u8 *bssid = NULL;
2401 u16 reason_code;
2402
2403 lockdep_assert_held(&ifmgd->mtx);
2404
2405 if (len < 24 + 2)
2406 return RX_MGMT_NONE;
2407
2408 if (!ifmgd->associated ||
2409 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2410 return RX_MGMT_NONE;
2411
2412 bssid = ifmgd->associated->bssid;
2413
2414 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code);
2415
2416 sdata_info(sdata, "deauthenticated from %pM (Reason: %u)\n",
2417 bssid, reason_code);
2418
2419 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2420
2421 return RX_MGMT_CFG80211_DEAUTH;
2422 }
2423
2424
2425 static enum rx_mgmt_action __must_check
2426 ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata,
2427 struct ieee80211_mgmt *mgmt, size_t len)
2428 {
2429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2430 u16 reason_code;
2431
2432 lockdep_assert_held(&ifmgd->mtx);
2433
2434 if (len < 24 + 2)
2435 return RX_MGMT_NONE;
2436
2437 if (!ifmgd->associated ||
2438 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2439 return RX_MGMT_NONE;
2440
2441 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code);
2442
2443 sdata_info(sdata, "disassociated from %pM (Reason: %u)\n",
2444 mgmt->sa, reason_code);
2445
2446 ieee80211_set_disassoc(sdata, 0, 0, false, NULL);
2447
2448 return RX_MGMT_CFG80211_DISASSOC;
2449 }
2450
2451 static void ieee80211_get_rates(struct ieee80211_supported_band *sband,
2452 u8 *supp_rates, unsigned int supp_rates_len,
2453 u32 *rates, u32 *basic_rates,
2454 bool *have_higher_than_11mbit,
2455 int *min_rate, int *min_rate_index)
2456 {
2457 int i, j;
2458
2459 for (i = 0; i < supp_rates_len; i++) {
2460 int rate = (supp_rates[i] & 0x7f) * 5;
2461 bool is_basic = !!(supp_rates[i] & 0x80);
2462
2463 if (rate > 110)
2464 *have_higher_than_11mbit = true;
2465
2466 /*
2467 * BSS_MEMBERSHIP_SELECTOR_HT_PHY is defined in 802.11n-2009
2468 * 7.3.2.2 as a magic value instead of a rate. Hence, skip it.
2469 *
2470 * Note: Even through the membership selector and the basic
2471 * rate flag share the same bit, they are not exactly
2472 * the same.
2473 */
2474 if (!!(supp_rates[i] & 0x80) &&
2475 (supp_rates[i] & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2476 continue;
2477
2478 for (j = 0; j < sband->n_bitrates; j++) {
2479 if (sband->bitrates[j].bitrate == rate) {
2480 *rates |= BIT(j);
2481 if (is_basic)
2482 *basic_rates |= BIT(j);
2483 if (rate < *min_rate) {
2484 *min_rate = rate;
2485 *min_rate_index = j;
2486 }
2487 break;
2488 }
2489 }
2490 }
2491 }
2492
2493 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata,
2494 bool assoc)
2495 {
2496 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
2497
2498 lockdep_assert_held(&sdata->u.mgd.mtx);
2499
2500 if (!assoc) {
2501 sta_info_destroy_addr(sdata, assoc_data->bss->bssid);
2502
2503 memset(sdata->u.mgd.bssid, 0, ETH_ALEN);
2504 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
2505 sdata->u.mgd.flags = 0;
2506 ieee80211_vif_release_channel(sdata);
2507 }
2508
2509 kfree(assoc_data);
2510 sdata->u.mgd.assoc_data = NULL;
2511 }
2512
2513 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata,
2514 struct cfg80211_bss *cbss,
2515 struct ieee80211_mgmt *mgmt, size_t len)
2516 {
2517 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2518 struct ieee80211_local *local = sdata->local;
2519 struct ieee80211_supported_band *sband;
2520 struct sta_info *sta;
2521 u8 *pos;
2522 u16 capab_info, aid;
2523 struct ieee802_11_elems elems;
2524 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2525 u32 changed = 0;
2526 int err;
2527
2528 /* AssocResp and ReassocResp have identical structure */
2529
2530 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2531 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2532
2533 if ((aid & (BIT(15) | BIT(14))) != (BIT(15) | BIT(14)))
2534 sdata_info(sdata, "invalid AID value 0x%x; bits 15:14 not set\n",
2535 aid);
2536 aid &= ~(BIT(15) | BIT(14));
2537
2538 ifmgd->broken_ap = false;
2539
2540 if (aid == 0 || aid > IEEE80211_MAX_AID) {
2541 sdata_info(sdata, "invalid AID value %d (out of range), turn off PS\n",
2542 aid);
2543 aid = 0;
2544 ifmgd->broken_ap = true;
2545 }
2546
2547 pos = mgmt->u.assoc_resp.variable;
2548 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2549
2550 if (!elems.supp_rates) {
2551 sdata_info(sdata, "no SuppRates element in AssocResp\n");
2552 return false;
2553 }
2554
2555 ifmgd->aid = aid;
2556
2557 /*
2558 * We previously checked these in the beacon/probe response, so
2559 * they should be present here. This is just a safety net.
2560 */
2561 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
2562 (!elems.wmm_param || !elems.ht_cap_elem || !elems.ht_operation)) {
2563 sdata_info(sdata,
2564 "HT AP is missing WMM params or HT capability/operation in AssocResp\n");
2565 return false;
2566 }
2567
2568 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
2569 (!elems.vht_cap_elem || !elems.vht_operation)) {
2570 sdata_info(sdata,
2571 "VHT AP is missing VHT capability/operation in AssocResp\n");
2572 return false;
2573 }
2574
2575 mutex_lock(&sdata->local->sta_mtx);
2576 /*
2577 * station info was already allocated and inserted before
2578 * the association and should be available to us
2579 */
2580 sta = sta_info_get(sdata, cbss->bssid);
2581 if (WARN_ON(!sta)) {
2582 mutex_unlock(&sdata->local->sta_mtx);
2583 return false;
2584 }
2585
2586 sband = local->hw.wiphy->bands[ieee80211_get_sdata_band(sdata)];
2587
2588 /* Set up internal HT/VHT capabilities */
2589 if (elems.ht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_HT))
2590 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband,
2591 elems.ht_cap_elem, sta);
2592
2593 if (elems.vht_cap_elem && !(ifmgd->flags & IEEE80211_STA_DISABLE_VHT))
2594 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband,
2595 elems.vht_cap_elem, sta);
2596
2597 /*
2598 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data
2599 * in their association response, so ignore that data for our own
2600 * configuration. If it changed since the last beacon, we'll get the
2601 * next beacon and update then.
2602 */
2603
2604 /*
2605 * If an operating mode notification IE is present, override the
2606 * NSS calculation (that would be done in rate_control_rate_init())
2607 * and use the # of streams from that element.
2608 */
2609 if (elems.opmode_notif &&
2610 !(*elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) {
2611 u8 nss;
2612
2613 nss = *elems.opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK;
2614 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT;
2615 nss += 1;
2616 sta->sta.rx_nss = nss;
2617 }
2618
2619 rate_control_rate_init(sta);
2620
2621 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED)
2622 set_sta_flag(sta, WLAN_STA_MFP);
2623
2624 if (elems.wmm_param)
2625 set_sta_flag(sta, WLAN_STA_WME);
2626
2627 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC);
2628 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT))
2629 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED);
2630 if (err) {
2631 sdata_info(sdata,
2632 "failed to move station %pM to desired state\n",
2633 sta->sta.addr);
2634 WARN_ON(__sta_info_destroy(sta));
2635 mutex_unlock(&sdata->local->sta_mtx);
2636 return false;
2637 }
2638
2639 mutex_unlock(&sdata->local->sta_mtx);
2640
2641 /*
2642 * Always handle WMM once after association regardless
2643 * of the first value the AP uses. Setting -1 here has
2644 * that effect because the AP values is an unsigned
2645 * 4-bit value.
2646 */
2647 ifmgd->wmm_last_param_set = -1;
2648
2649 if (elems.wmm_param)
2650 ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
2651 elems.wmm_param_len);
2652 else
2653 ieee80211_set_wmm_default(sdata, false);
2654 changed |= BSS_CHANGED_QOS;
2655
2656 /* set AID and assoc capability,
2657 * ieee80211_set_associated() will tell the driver */
2658 bss_conf->aid = aid;
2659 bss_conf->assoc_capability = capab_info;
2660 ieee80211_set_associated(sdata, cbss, changed);
2661
2662 /*
2663 * If we're using 4-addr mode, let the AP know that we're
2664 * doing so, so that it can create the STA VLAN on its side
2665 */
2666 if (ifmgd->use_4addr)
2667 ieee80211_send_4addr_nullfunc(local, sdata);
2668
2669 /*
2670 * Start timer to probe the connection to the AP now.
2671 * Also start the timer that will detect beacon loss.
2672 */
2673 ieee80211_sta_rx_notify(sdata, (struct ieee80211_hdr *)mgmt);
2674 ieee80211_sta_reset_beacon_monitor(sdata);
2675
2676 return true;
2677 }
2678
2679 static enum rx_mgmt_action __must_check
2680 ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata,
2681 struct ieee80211_mgmt *mgmt, size_t len,
2682 struct cfg80211_bss **bss)
2683 {
2684 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2685 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data;
2686 u16 capab_info, status_code, aid;
2687 struct ieee802_11_elems elems;
2688 u8 *pos;
2689 bool reassoc;
2690
2691 lockdep_assert_held(&ifmgd->mtx);
2692
2693 if (!assoc_data)
2694 return RX_MGMT_NONE;
2695 if (!ether_addr_equal(assoc_data->bss->bssid, mgmt->bssid))
2696 return RX_MGMT_NONE;
2697
2698 /*
2699 * AssocResp and ReassocResp have identical structure, so process both
2700 * of them in this function.
2701 */
2702
2703 if (len < 24 + 6)
2704 return RX_MGMT_NONE;
2705
2706 reassoc = ieee80211_is_reassoc_req(mgmt->frame_control);
2707 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info);
2708 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code);
2709 aid = le16_to_cpu(mgmt->u.assoc_resp.aid);
2710
2711 sdata_info(sdata,
2712 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n",
2713 reassoc ? "Rea" : "A", mgmt->sa,
2714 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14))));
2715
2716 pos = mgmt->u.assoc_resp.variable;
2717 ieee802_11_parse_elems(pos, len - (pos - (u8 *) mgmt), false, &elems);
2718
2719 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY &&
2720 elems.timeout_int &&
2721 elems.timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) {
2722 u32 tu, ms;
2723 tu = le32_to_cpu(elems.timeout_int->value);
2724 ms = tu * 1024 / 1000;
2725 sdata_info(sdata,
2726 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n",
2727 mgmt->sa, tu, ms);
2728 assoc_data->timeout = jiffies + msecs_to_jiffies(ms);
2729 assoc_data->timeout_started = true;
2730 if (ms > IEEE80211_ASSOC_TIMEOUT)
2731 run_again(ifmgd, assoc_data->timeout);
2732 return RX_MGMT_NONE;
2733 }
2734
2735 *bss = assoc_data->bss;
2736
2737 if (status_code != WLAN_STATUS_SUCCESS) {
2738 sdata_info(sdata, "%pM denied association (code=%d)\n",
2739 mgmt->sa, status_code);
2740 ieee80211_destroy_assoc_data(sdata, false);
2741 } else {
2742 if (!ieee80211_assoc_success(sdata, *bss, mgmt, len)) {
2743 /* oops -- internal error -- send timeout for now */
2744 ieee80211_destroy_assoc_data(sdata, false);
2745 cfg80211_put_bss(sdata->local->hw.wiphy, *bss);
2746 return RX_MGMT_CFG80211_ASSOC_TIMEOUT;
2747 }
2748 sdata_info(sdata, "associated\n");
2749
2750 /*
2751 * destroy assoc_data afterwards, as otherwise an idle
2752 * recalc after assoc_data is NULL but before associated
2753 * is set can cause the interface to go idle
2754 */
2755 ieee80211_destroy_assoc_data(sdata, true);
2756 }
2757
2758 return RX_MGMT_CFG80211_RX_ASSOC;
2759 }
2760
2761 static void ieee80211_rx_bss_info(struct ieee80211_sub_if_data *sdata,
2762 struct ieee80211_mgmt *mgmt, size_t len,
2763 struct ieee80211_rx_status *rx_status,
2764 struct ieee802_11_elems *elems)
2765 {
2766 struct ieee80211_local *local = sdata->local;
2767 int freq;
2768 struct ieee80211_bss *bss;
2769 struct ieee80211_channel *channel;
2770 bool need_ps = false;
2771
2772 lockdep_assert_held(&sdata->u.mgd.mtx);
2773
2774 if ((sdata->u.mgd.associated &&
2775 ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid)) ||
2776 (sdata->u.mgd.assoc_data &&
2777 ether_addr_equal(mgmt->bssid,
2778 sdata->u.mgd.assoc_data->bss->bssid))) {
2779 /* not previously set so we may need to recalc */
2780 need_ps = sdata->u.mgd.associated && !sdata->u.mgd.dtim_period;
2781
2782 if (elems->tim && !elems->parse_error) {
2783 const struct ieee80211_tim_ie *tim_ie = elems->tim;
2784 sdata->u.mgd.dtim_period = tim_ie->dtim_period;
2785 }
2786 }
2787
2788 if (elems->ds_params)
2789 freq = ieee80211_channel_to_frequency(elems->ds_params[0],
2790 rx_status->band);
2791 else
2792 freq = rx_status->freq;
2793
2794 channel = ieee80211_get_channel(local->hw.wiphy, freq);
2795
2796 if (!channel || channel->flags & IEEE80211_CHAN_DISABLED)
2797 return;
2798
2799 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, elems,
2800 channel);
2801 if (bss)
2802 ieee80211_rx_bss_put(local, bss);
2803
2804 if (!sdata->u.mgd.associated ||
2805 !ether_addr_equal(mgmt->bssid, sdata->u.mgd.associated->bssid))
2806 return;
2807
2808 if (need_ps) {
2809 mutex_lock(&local->iflist_mtx);
2810 ieee80211_recalc_ps(local, -1);
2811 mutex_unlock(&local->iflist_mtx);
2812 }
2813
2814 ieee80211_sta_process_chanswitch(sdata, rx_status->mactime,
2815 elems, true);
2816
2817 }
2818
2819
2820 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_sub_if_data *sdata,
2821 struct sk_buff *skb)
2822 {
2823 struct ieee80211_mgmt *mgmt = (void *)skb->data;
2824 struct ieee80211_if_managed *ifmgd;
2825 struct ieee80211_rx_status *rx_status = (void *) skb->cb;
2826 size_t baselen, len = skb->len;
2827 struct ieee802_11_elems elems;
2828
2829 ifmgd = &sdata->u.mgd;
2830
2831 ASSERT_MGD_MTX(ifmgd);
2832
2833 if (!ether_addr_equal(mgmt->da, sdata->vif.addr))
2834 return; /* ignore ProbeResp to foreign address */
2835
2836 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt;
2837 if (baselen > len)
2838 return;
2839
2840 ieee802_11_parse_elems(mgmt->u.probe_resp.variable, len - baselen,
2841 false, &elems);
2842
2843 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2844
2845 if (ifmgd->associated &&
2846 ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2847 ieee80211_reset_ap_probe(sdata);
2848
2849 if (ifmgd->auth_data && !ifmgd->auth_data->bss->proberesp_ies &&
2850 ether_addr_equal(mgmt->bssid, ifmgd->auth_data->bss->bssid)) {
2851 /* got probe response, continue with auth */
2852 sdata_info(sdata, "direct probe responded\n");
2853 ifmgd->auth_data->tries = 0;
2854 ifmgd->auth_data->timeout = jiffies;
2855 ifmgd->auth_data->timeout_started = true;
2856 run_again(ifmgd, ifmgd->auth_data->timeout);
2857 }
2858 }
2859
2860 /*
2861 * This is the canonical list of information elements we care about,
2862 * the filter code also gives us all changes to the Microsoft OUI
2863 * (00:50:F2) vendor IE which is used for WMM which we need to track.
2864 *
2865 * We implement beacon filtering in software since that means we can
2866 * avoid processing the frame here and in cfg80211, and userspace
2867 * will not be able to tell whether the hardware supports it or not.
2868 *
2869 * XXX: This list needs to be dynamic -- userspace needs to be able to
2870 * add items it requires. It also needs to be able to tell us to
2871 * look out for other vendor IEs.
2872 */
2873 static const u64 care_about_ies =
2874 (1ULL << WLAN_EID_COUNTRY) |
2875 (1ULL << WLAN_EID_ERP_INFO) |
2876 (1ULL << WLAN_EID_CHANNEL_SWITCH) |
2877 (1ULL << WLAN_EID_PWR_CONSTRAINT) |
2878 (1ULL << WLAN_EID_HT_CAPABILITY) |
2879 (1ULL << WLAN_EID_HT_OPERATION);
2880
2881 static enum rx_mgmt_action
2882 ieee80211_rx_mgmt_beacon(struct ieee80211_sub_if_data *sdata,
2883 struct ieee80211_mgmt *mgmt, size_t len,
2884 u8 *deauth_buf, struct ieee80211_rx_status *rx_status)
2885 {
2886 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2887 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf;
2888 size_t baselen;
2889 struct ieee802_11_elems elems;
2890 struct ieee80211_local *local = sdata->local;
2891 struct ieee80211_chanctx_conf *chanctx_conf;
2892 struct ieee80211_channel *chan;
2893 struct sta_info *sta;
2894 u32 changed = 0;
2895 bool erp_valid;
2896 u8 erp_value = 0;
2897 u32 ncrc;
2898 u8 *bssid;
2899
2900 lockdep_assert_held(&ifmgd->mtx);
2901
2902 /* Process beacon from the current BSS */
2903 baselen = (u8 *) mgmt->u.beacon.variable - (u8 *) mgmt;
2904 if (baselen > len)
2905 return RX_MGMT_NONE;
2906
2907 rcu_read_lock();
2908 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
2909 if (!chanctx_conf) {
2910 rcu_read_unlock();
2911 return RX_MGMT_NONE;
2912 }
2913
2914 if (rx_status->freq != chanctx_conf->def.chan->center_freq) {
2915 rcu_read_unlock();
2916 return RX_MGMT_NONE;
2917 }
2918 chan = chanctx_conf->def.chan;
2919 rcu_read_unlock();
2920
2921 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon &&
2922 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->bss->bssid)) {
2923 ieee802_11_parse_elems(mgmt->u.beacon.variable,
2924 len - baselen, false, &elems);
2925
2926 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
2927 ifmgd->assoc_data->have_beacon = true;
2928 ifmgd->assoc_data->need_beacon = false;
2929 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
2930 sdata->vif.bss_conf.sync_tsf =
2931 le64_to_cpu(mgmt->u.beacon.timestamp);
2932 sdata->vif.bss_conf.sync_device_ts =
2933 rx_status->device_timestamp;
2934 if (elems.tim)
2935 sdata->vif.bss_conf.sync_dtim_count =
2936 elems.tim->dtim_count;
2937 else
2938 sdata->vif.bss_conf.sync_dtim_count = 0;
2939 }
2940 /* continue assoc process */
2941 ifmgd->assoc_data->timeout = jiffies;
2942 ifmgd->assoc_data->timeout_started = true;
2943 run_again(ifmgd, ifmgd->assoc_data->timeout);
2944 return RX_MGMT_NONE;
2945 }
2946
2947 if (!ifmgd->associated ||
2948 !ether_addr_equal(mgmt->bssid, ifmgd->associated->bssid))
2949 return RX_MGMT_NONE;
2950 bssid = ifmgd->associated->bssid;
2951
2952 /* Track average RSSI from the Beacon frames of the current AP */
2953 ifmgd->last_beacon_signal = rx_status->signal;
2954 if (ifmgd->flags & IEEE80211_STA_RESET_SIGNAL_AVE) {
2955 ifmgd->flags &= ~IEEE80211_STA_RESET_SIGNAL_AVE;
2956 ifmgd->ave_beacon_signal = rx_status->signal * 16;
2957 ifmgd->last_cqm_event_signal = 0;
2958 ifmgd->count_beacon_signal = 1;
2959 ifmgd->last_ave_beacon_signal = 0;
2960 } else {
2961 ifmgd->ave_beacon_signal =
2962 (IEEE80211_SIGNAL_AVE_WEIGHT * rx_status->signal * 16 +
2963 (16 - IEEE80211_SIGNAL_AVE_WEIGHT) *
2964 ifmgd->ave_beacon_signal) / 16;
2965 ifmgd->count_beacon_signal++;
2966 }
2967
2968 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold &&
2969 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) {
2970 int sig = ifmgd->ave_beacon_signal;
2971 int last_sig = ifmgd->last_ave_beacon_signal;
2972
2973 /*
2974 * if signal crosses either of the boundaries, invoke callback
2975 * with appropriate parameters
2976 */
2977 if (sig > ifmgd->rssi_max_thold &&
2978 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) {
2979 ifmgd->last_ave_beacon_signal = sig;
2980 drv_rssi_callback(local, sdata, RSSI_EVENT_HIGH);
2981 } else if (sig < ifmgd->rssi_min_thold &&
2982 (last_sig >= ifmgd->rssi_max_thold ||
2983 last_sig == 0)) {
2984 ifmgd->last_ave_beacon_signal = sig;
2985 drv_rssi_callback(local, sdata, RSSI_EVENT_LOW);
2986 }
2987 }
2988
2989 if (bss_conf->cqm_rssi_thold &&
2990 ifmgd->count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT &&
2991 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) {
2992 int sig = ifmgd->ave_beacon_signal / 16;
2993 int last_event = ifmgd->last_cqm_event_signal;
2994 int thold = bss_conf->cqm_rssi_thold;
2995 int hyst = bss_conf->cqm_rssi_hyst;
2996 if (sig < thold &&
2997 (last_event == 0 || sig < last_event - hyst)) {
2998 ifmgd->last_cqm_event_signal = sig;
2999 ieee80211_cqm_rssi_notify(
3000 &sdata->vif,
3001 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW,
3002 GFP_KERNEL);
3003 } else if (sig > thold &&
3004 (last_event == 0 || sig > last_event + hyst)) {
3005 ifmgd->last_cqm_event_signal = sig;
3006 ieee80211_cqm_rssi_notify(
3007 &sdata->vif,
3008 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH,
3009 GFP_KERNEL);
3010 }
3011 }
3012
3013 if (ifmgd->flags & IEEE80211_STA_BEACON_POLL) {
3014 mlme_dbg_ratelimited(sdata,
3015 "cancelling AP probe due to a received beacon\n");
3016 mutex_lock(&local->mtx);
3017 ifmgd->flags &= ~IEEE80211_STA_BEACON_POLL;
3018 ieee80211_run_deferred_scan(local);
3019 mutex_unlock(&local->mtx);
3020
3021 mutex_lock(&local->iflist_mtx);
3022 ieee80211_recalc_ps(local, -1);
3023 mutex_unlock(&local->iflist_mtx);
3024 }
3025
3026 /*
3027 * Push the beacon loss detection into the future since
3028 * we are processing a beacon from the AP just now.
3029 */
3030 ieee80211_sta_reset_beacon_monitor(sdata);
3031
3032 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4);
3033 ncrc = ieee802_11_parse_elems_crc(mgmt->u.beacon.variable,
3034 len - baselen, false, &elems,
3035 care_about_ies, ncrc);
3036
3037 if (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK) {
3038 bool directed_tim = ieee80211_check_tim(elems.tim,
3039 elems.tim_len,
3040 ifmgd->aid);
3041 if (directed_tim) {
3042 if (local->hw.conf.dynamic_ps_timeout > 0) {
3043 if (local->hw.conf.flags & IEEE80211_CONF_PS) {
3044 local->hw.conf.flags &= ~IEEE80211_CONF_PS;
3045 ieee80211_hw_config(local,
3046 IEEE80211_CONF_CHANGE_PS);
3047 }
3048 ieee80211_send_nullfunc(local, sdata, 0);
3049 } else if (!local->pspolling && sdata->u.mgd.powersave) {
3050 local->pspolling = true;
3051
3052 /*
3053 * Here is assumed that the driver will be
3054 * able to send ps-poll frame and receive a
3055 * response even though power save mode is
3056 * enabled, but some drivers might require
3057 * to disable power save here. This needs
3058 * to be investigated.
3059 */
3060 ieee80211_send_pspoll(local, sdata);
3061 }
3062 }
3063 }
3064
3065 if (sdata->vif.p2p) {
3066 struct ieee80211_p2p_noa_attr noa = {};
3067 int ret;
3068
3069 ret = cfg80211_get_p2p_attr(mgmt->u.beacon.variable,
3070 len - baselen,
3071 IEEE80211_P2P_ATTR_ABSENCE_NOTICE,
3072 (u8 *) &noa, sizeof(noa));
3073 if (ret >= 2) {
3074 if (sdata->u.mgd.p2p_noa_index != noa.index) {
3075 /* valid noa_attr and index changed */
3076 sdata->u.mgd.p2p_noa_index = noa.index;
3077 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa));
3078 changed |= BSS_CHANGED_P2P_PS;
3079 /*
3080 * make sure we update all information, the CRC
3081 * mechanism doesn't look at P2P attributes.
3082 */
3083 ifmgd->beacon_crc_valid = false;
3084 }
3085 } else if (sdata->u.mgd.p2p_noa_index != -1) {
3086 /* noa_attr not found and we had valid noa_attr before */
3087 sdata->u.mgd.p2p_noa_index = -1;
3088 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr));
3089 changed |= BSS_CHANGED_P2P_PS;
3090 ifmgd->beacon_crc_valid = false;
3091 }
3092 }
3093
3094 if (ncrc == ifmgd->beacon_crc && ifmgd->beacon_crc_valid)
3095 return RX_MGMT_NONE;
3096 ifmgd->beacon_crc = ncrc;
3097 ifmgd->beacon_crc_valid = true;
3098
3099 ieee80211_rx_bss_info(sdata, mgmt, len, rx_status, &elems);
3100
3101 if (ieee80211_sta_wmm_params(local, sdata, elems.wmm_param,
3102 elems.wmm_param_len))
3103 changed |= BSS_CHANGED_QOS;
3104
3105 /*
3106 * If we haven't had a beacon before, tell the driver about the
3107 * DTIM period (and beacon timing if desired) now.
3108 */
3109 if (!bss_conf->dtim_period) {
3110 /* a few bogus AP send dtim_period = 0 or no TIM IE */
3111 if (elems.tim)
3112 bss_conf->dtim_period = elems.tim->dtim_period ?: 1;
3113 else
3114 bss_conf->dtim_period = 1;
3115
3116 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
3117 sdata->vif.bss_conf.sync_tsf =
3118 le64_to_cpu(mgmt->u.beacon.timestamp);
3119 sdata->vif.bss_conf.sync_device_ts =
3120 rx_status->device_timestamp;
3121 if (elems.tim)
3122 sdata->vif.bss_conf.sync_dtim_count =
3123 elems.tim->dtim_count;
3124 else
3125 sdata->vif.bss_conf.sync_dtim_count = 0;
3126 }
3127
3128 changed |= BSS_CHANGED_DTIM_PERIOD;
3129 }
3130
3131 if (elems.erp_info) {
3132 erp_valid = true;
3133 erp_value = elems.erp_info[0];
3134 } else {
3135 erp_valid = false;
3136 }
3137 changed |= ieee80211_handle_bss_capability(sdata,
3138 le16_to_cpu(mgmt->u.beacon.capab_info),
3139 erp_valid, erp_value);
3140
3141 mutex_lock(&local->sta_mtx);
3142 sta = sta_info_get(sdata, bssid);
3143
3144 if (ieee80211_config_bw(sdata, sta, elems.ht_operation,
3145 elems.vht_operation, bssid, &changed)) {
3146 mutex_unlock(&local->sta_mtx);
3147 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
3148 WLAN_REASON_DEAUTH_LEAVING,
3149 true, deauth_buf);
3150 return RX_MGMT_CFG80211_TX_DEAUTH;
3151 }
3152
3153 if (sta && elems.opmode_notif)
3154 ieee80211_vht_handle_opmode(sdata, sta, *elems.opmode_notif,
3155 rx_status->band, true);
3156 mutex_unlock(&local->sta_mtx);
3157
3158 if (elems.country_elem && elems.pwr_constr_elem &&
3159 mgmt->u.probe_resp.capab_info &
3160 cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT))
3161 changed |= ieee80211_handle_pwr_constr(sdata, chan,
3162 elems.country_elem,
3163 elems.country_elem_len,
3164 elems.pwr_constr_elem);
3165
3166 ieee80211_bss_info_change_notify(sdata, changed);
3167
3168 return RX_MGMT_NONE;
3169 }
3170
3171 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata,
3172 struct sk_buff *skb)
3173 {
3174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3175 struct ieee80211_rx_status *rx_status;
3176 struct ieee80211_mgmt *mgmt;
3177 struct cfg80211_bss *bss = NULL;
3178 enum rx_mgmt_action rma = RX_MGMT_NONE;
3179 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN];
3180 u16 fc;
3181 struct ieee802_11_elems elems;
3182 int ies_len;
3183
3184 rx_status = (struct ieee80211_rx_status *) skb->cb;
3185 mgmt = (struct ieee80211_mgmt *) skb->data;
3186 fc = le16_to_cpu(mgmt->frame_control);
3187
3188 mutex_lock(&ifmgd->mtx);
3189
3190 switch (fc & IEEE80211_FCTL_STYPE) {
3191 case IEEE80211_STYPE_BEACON:
3192 rma = ieee80211_rx_mgmt_beacon(sdata, mgmt, skb->len,
3193 deauth_buf, rx_status);
3194 break;
3195 case IEEE80211_STYPE_PROBE_RESP:
3196 ieee80211_rx_mgmt_probe_resp(sdata, skb);
3197 break;
3198 case IEEE80211_STYPE_AUTH:
3199 rma = ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len);
3200 break;
3201 case IEEE80211_STYPE_DEAUTH:
3202 rma = ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len);
3203 break;
3204 case IEEE80211_STYPE_DISASSOC:
3205 rma = ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len);
3206 break;
3207 case IEEE80211_STYPE_ASSOC_RESP:
3208 case IEEE80211_STYPE_REASSOC_RESP:
3209 rma = ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len, &bss);
3210 break;
3211 case IEEE80211_STYPE_ACTION:
3212 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) {
3213 ies_len = skb->len -
3214 offsetof(struct ieee80211_mgmt,
3215 u.action.u.chan_switch.variable);
3216
3217 if (ies_len < 0)
3218 break;
3219
3220 ieee802_11_parse_elems(
3221 mgmt->u.action.u.chan_switch.variable,
3222 ies_len, true, &elems);
3223
3224 if (elems.parse_error)
3225 break;
3226
3227 ieee80211_sta_process_chanswitch(sdata,
3228 rx_status->mactime,
3229 &elems, false);
3230 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) {
3231 ies_len = skb->len -
3232 offsetof(struct ieee80211_mgmt,
3233 u.action.u.ext_chan_switch.variable);
3234
3235 if (ies_len < 0)
3236 break;
3237
3238 ieee802_11_parse_elems(
3239 mgmt->u.action.u.ext_chan_switch.variable,
3240 ies_len, true, &elems);
3241
3242 if (elems.parse_error)
3243 break;
3244
3245 /* for the handling code pretend this was also an IE */
3246 elems.ext_chansw_ie =
3247 &mgmt->u.action.u.ext_chan_switch.data;
3248
3249 ieee80211_sta_process_chanswitch(sdata,
3250 rx_status->mactime,
3251 &elems, false);
3252 }
3253 break;
3254 }
3255 mutex_unlock(&ifmgd->mtx);
3256
3257 switch (rma) {
3258 case RX_MGMT_NONE:
3259 /* no action */
3260 break;
3261 case RX_MGMT_CFG80211_DEAUTH:
3262 cfg80211_send_deauth(sdata->dev, (u8 *)mgmt, skb->len);
3263 break;
3264 case RX_MGMT_CFG80211_DISASSOC:
3265 cfg80211_send_disassoc(sdata->dev, (u8 *)mgmt, skb->len);
3266 break;
3267 case RX_MGMT_CFG80211_RX_AUTH:
3268 cfg80211_send_rx_auth(sdata->dev, (u8 *)mgmt, skb->len);
3269 break;
3270 case RX_MGMT_CFG80211_RX_ASSOC:
3271 cfg80211_send_rx_assoc(sdata->dev, bss, (u8 *)mgmt, skb->len);
3272 break;
3273 case RX_MGMT_CFG80211_ASSOC_TIMEOUT:
3274 cfg80211_send_assoc_timeout(sdata->dev, mgmt->bssid);
3275 break;
3276 case RX_MGMT_CFG80211_TX_DEAUTH:
3277 cfg80211_send_deauth(sdata->dev, deauth_buf,
3278 sizeof(deauth_buf));
3279 break;
3280 default:
3281 WARN(1, "unexpected: %d", rma);
3282 }
3283 }
3284
3285 static void ieee80211_sta_timer(unsigned long data)
3286 {
3287 struct ieee80211_sub_if_data *sdata =
3288 (struct ieee80211_sub_if_data *) data;
3289
3290 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3291 }
3292
3293 static void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata,
3294 u8 *bssid, u8 reason, bool tx)
3295 {
3296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3297 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
3298
3299 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason,
3300 tx, frame_buf);
3301 mutex_unlock(&ifmgd->mtx);
3302
3303 /*
3304 * must be outside lock due to cfg80211,
3305 * but that's not a problem.
3306 */
3307 cfg80211_send_deauth(sdata->dev, frame_buf, IEEE80211_DEAUTH_FRAME_LEN);
3308
3309 mutex_lock(&ifmgd->mtx);
3310 }
3311
3312 static int ieee80211_probe_auth(struct ieee80211_sub_if_data *sdata)
3313 {
3314 struct ieee80211_local *local = sdata->local;
3315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3316 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data;
3317 u32 tx_flags = 0;
3318
3319 lockdep_assert_held(&ifmgd->mtx);
3320
3321 if (WARN_ON_ONCE(!auth_data))
3322 return -EINVAL;
3323
3324 auth_data->tries++;
3325
3326 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) {
3327 sdata_info(sdata, "authentication with %pM timed out\n",
3328 auth_data->bss->bssid);
3329
3330 /*
3331 * Most likely AP is not in the range so remove the
3332 * bss struct for that AP.
3333 */
3334 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss);
3335
3336 return -ETIMEDOUT;
3337 }
3338
3339 drv_mgd_prepare_tx(local, sdata);
3340
3341 if (auth_data->bss->proberesp_ies) {
3342 u16 trans = 1;
3343 u16 status = 0;
3344
3345 sdata_info(sdata, "send auth to %pM (try %d/%d)\n",
3346 auth_data->bss->bssid, auth_data->tries,
3347 IEEE80211_AUTH_MAX_TRIES);
3348
3349 auth_data->expected_transaction = 2;
3350
3351 if (auth_data->algorithm == WLAN_AUTH_SAE) {
3352 trans = auth_data->sae_trans;
3353 status = auth_data->sae_status;
3354 auth_data->expected_transaction = trans;
3355 }
3356
3357 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3358 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS |
3359 IEEE80211_TX_INTFL_MLME_CONN_TX;
3360
3361 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status,
3362 auth_data->data, auth_data->data_len,
3363 auth_data->bss->bssid,
3364 auth_data->bss->bssid, NULL, 0, 0,
3365 tx_flags);
3366 } else {
3367 const u8 *ssidie;
3368
3369 sdata_info(sdata, "direct probe to %pM (try %d/%i)\n",
3370 auth_data->bss->bssid, auth_data->tries,
3371 IEEE80211_AUTH_MAX_TRIES);
3372
3373 rcu_read_lock();
3374 ssidie = ieee80211_bss_get_ie(auth_data->bss, WLAN_EID_SSID);
3375 if (!ssidie) {
3376 rcu_read_unlock();
3377 return -EINVAL;
3378 }
3379 /*
3380 * Direct probe is sent to broadcast address as some APs
3381 * will not answer to direct packet in unassociated state.
3382 */
3383 ieee80211_send_probe_req(sdata, NULL, ssidie + 2, ssidie[1],
3384 NULL, 0, (u32) -1, true, 0,
3385 auth_data->bss->channel, false);
3386 rcu_read_unlock();
3387 }
3388
3389 if (tx_flags == 0) {
3390 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT;
3391 ifmgd->auth_data->timeout_started = true;
3392 run_again(ifmgd, auth_data->timeout);
3393 } else {
3394 auth_data->timeout_started = false;
3395 }
3396
3397 return 0;
3398 }
3399
3400 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata)
3401 {
3402 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data;
3403 struct ieee80211_local *local = sdata->local;
3404
3405 lockdep_assert_held(&sdata->u.mgd.mtx);
3406
3407 assoc_data->tries++;
3408 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) {
3409 sdata_info(sdata, "association with %pM timed out\n",
3410 assoc_data->bss->bssid);
3411
3412 /*
3413 * Most likely AP is not in the range so remove the
3414 * bss struct for that AP.
3415 */
3416 cfg80211_unlink_bss(local->hw.wiphy, assoc_data->bss);
3417
3418 return -ETIMEDOUT;
3419 }
3420
3421 sdata_info(sdata, "associate with %pM (try %d/%d)\n",
3422 assoc_data->bss->bssid, assoc_data->tries,
3423 IEEE80211_ASSOC_MAX_TRIES);
3424 ieee80211_send_assoc(sdata);
3425
3426 if (!(local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)) {
3427 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT;
3428 assoc_data->timeout_started = true;
3429 run_again(&sdata->u.mgd, assoc_data->timeout);
3430 } else {
3431 assoc_data->timeout_started = false;
3432 }
3433
3434 return 0;
3435 }
3436
3437 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata,
3438 __le16 fc, bool acked)
3439 {
3440 struct ieee80211_local *local = sdata->local;
3441
3442 sdata->u.mgd.status_fc = fc;
3443 sdata->u.mgd.status_acked = acked;
3444 sdata->u.mgd.status_received = true;
3445
3446 ieee80211_queue_work(&local->hw, &sdata->work);
3447 }
3448
3449 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata)
3450 {
3451 struct ieee80211_local *local = sdata->local;
3452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3453
3454 mutex_lock(&ifmgd->mtx);
3455
3456 if (ifmgd->status_received) {
3457 __le16 fc = ifmgd->status_fc;
3458 bool status_acked = ifmgd->status_acked;
3459
3460 ifmgd->status_received = false;
3461 if (ifmgd->auth_data &&
3462 (ieee80211_is_probe_req(fc) || ieee80211_is_auth(fc))) {
3463 if (status_acked) {
3464 ifmgd->auth_data->timeout =
3465 jiffies + IEEE80211_AUTH_TIMEOUT_SHORT;
3466 run_again(ifmgd, ifmgd->auth_data->timeout);
3467 } else {
3468 ifmgd->auth_data->timeout = jiffies - 1;
3469 }
3470 ifmgd->auth_data->timeout_started = true;
3471 } else if (ifmgd->assoc_data &&
3472 (ieee80211_is_assoc_req(fc) ||
3473 ieee80211_is_reassoc_req(fc))) {
3474 if (status_acked) {
3475 ifmgd->assoc_data->timeout =
3476 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT;
3477 run_again(ifmgd, ifmgd->assoc_data->timeout);
3478 } else {
3479 ifmgd->assoc_data->timeout = jiffies - 1;
3480 }
3481 ifmgd->assoc_data->timeout_started = true;
3482 }
3483 }
3484
3485 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started &&
3486 time_after(jiffies, ifmgd->auth_data->timeout)) {
3487 if (ifmgd->auth_data->done) {
3488 /*
3489 * ok ... we waited for assoc but userspace didn't,
3490 * so let's just kill the auth data
3491 */
3492 ieee80211_destroy_auth_data(sdata, false);
3493 } else if (ieee80211_probe_auth(sdata)) {
3494 u8 bssid[ETH_ALEN];
3495
3496 memcpy(bssid, ifmgd->auth_data->bss->bssid, ETH_ALEN);
3497
3498 ieee80211_destroy_auth_data(sdata, false);
3499
3500 mutex_unlock(&ifmgd->mtx);
3501 cfg80211_send_auth_timeout(sdata->dev, bssid);
3502 mutex_lock(&ifmgd->mtx);
3503 }
3504 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started)
3505 run_again(ifmgd, ifmgd->auth_data->timeout);
3506
3507 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started &&
3508 time_after(jiffies, ifmgd->assoc_data->timeout)) {
3509 if ((ifmgd->assoc_data->need_beacon &&
3510 !ifmgd->assoc_data->have_beacon) ||
3511 ieee80211_do_assoc(sdata)) {
3512 u8 bssid[ETH_ALEN];
3513
3514 memcpy(bssid, ifmgd->assoc_data->bss->bssid, ETH_ALEN);
3515
3516 ieee80211_destroy_assoc_data(sdata, false);
3517
3518 mutex_unlock(&ifmgd->mtx);
3519 cfg80211_send_assoc_timeout(sdata->dev, bssid);
3520 mutex_lock(&ifmgd->mtx);
3521 }
3522 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started)
3523 run_again(ifmgd, ifmgd->assoc_data->timeout);
3524
3525 if (ifmgd->flags & (IEEE80211_STA_BEACON_POLL |
3526 IEEE80211_STA_CONNECTION_POLL) &&
3527 ifmgd->associated) {
3528 u8 bssid[ETH_ALEN];
3529 int max_tries;
3530
3531 memcpy(bssid, ifmgd->associated->bssid, ETH_ALEN);
3532
3533 if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS)
3534 max_tries = max_nullfunc_tries;
3535 else
3536 max_tries = max_probe_tries;
3537
3538 /* ACK received for nullfunc probing frame */
3539 if (!ifmgd->probe_send_count)
3540 ieee80211_reset_ap_probe(sdata);
3541 else if (ifmgd->nullfunc_failed) {
3542 if (ifmgd->probe_send_count < max_tries) {
3543 mlme_dbg(sdata,
3544 "No ack for nullfunc frame to AP %pM, try %d/%i\n",
3545 bssid, ifmgd->probe_send_count,
3546 max_tries);
3547 ieee80211_mgd_probe_ap_send(sdata);
3548 } else {
3549 mlme_dbg(sdata,
3550 "No ack for nullfunc frame to AP %pM, disconnecting.\n",
3551 bssid);
3552 ieee80211_sta_connection_lost(sdata, bssid,
3553 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY,
3554 false);
3555 }
3556 } else if (time_is_after_jiffies(ifmgd->probe_timeout))
3557 run_again(ifmgd, ifmgd->probe_timeout);
3558 else if (local->hw.flags & IEEE80211_HW_REPORTS_TX_ACK_STATUS) {
3559 mlme_dbg(sdata,
3560 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n",
3561 bssid, probe_wait_ms);
3562 ieee80211_sta_connection_lost(sdata, bssid,
3563 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3564 } else if (ifmgd->probe_send_count < max_tries) {
3565 mlme_dbg(sdata,
3566 "No probe response from AP %pM after %dms, try %d/%i\n",
3567 bssid, probe_wait_ms,
3568 ifmgd->probe_send_count, max_tries);
3569 ieee80211_mgd_probe_ap_send(sdata);
3570 } else {
3571 /*
3572 * We actually lost the connection ... or did we?
3573 * Let's make sure!
3574 */
3575 wiphy_debug(local->hw.wiphy,
3576 "%s: No probe response from AP %pM"
3577 " after %dms, disconnecting.\n",
3578 sdata->name,
3579 bssid, probe_wait_ms);
3580
3581 ieee80211_sta_connection_lost(sdata, bssid,
3582 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false);
3583 }
3584 }
3585
3586 mutex_unlock(&ifmgd->mtx);
3587 }
3588
3589 static void ieee80211_sta_bcn_mon_timer(unsigned long data)
3590 {
3591 struct ieee80211_sub_if_data *sdata =
3592 (struct ieee80211_sub_if_data *) data;
3593 struct ieee80211_local *local = sdata->local;
3594
3595 if (local->quiescing)
3596 return;
3597
3598 sdata->u.mgd.connection_loss = false;
3599 ieee80211_queue_work(&sdata->local->hw,
3600 &sdata->u.mgd.beacon_connection_loss_work);
3601 }
3602
3603 static void ieee80211_sta_conn_mon_timer(unsigned long data)
3604 {
3605 struct ieee80211_sub_if_data *sdata =
3606 (struct ieee80211_sub_if_data *) data;
3607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3608 struct ieee80211_local *local = sdata->local;
3609
3610 if (local->quiescing)
3611 return;
3612
3613 ieee80211_queue_work(&local->hw, &ifmgd->monitor_work);
3614 }
3615
3616 static void ieee80211_sta_monitor_work(struct work_struct *work)
3617 {
3618 struct ieee80211_sub_if_data *sdata =
3619 container_of(work, struct ieee80211_sub_if_data,
3620 u.mgd.monitor_work);
3621
3622 ieee80211_mgd_probe_ap(sdata, false);
3623 }
3624
3625 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata)
3626 {
3627 u32 flags;
3628
3629 if (sdata->vif.type == NL80211_IFTYPE_STATION) {
3630 __ieee80211_stop_poll(sdata);
3631
3632 /* let's probe the connection once */
3633 flags = sdata->local->hw.flags;
3634 if (!(flags & IEEE80211_HW_CONNECTION_MONITOR))
3635 ieee80211_queue_work(&sdata->local->hw,
3636 &sdata->u.mgd.monitor_work);
3637 /* and do all the other regular work too */
3638 ieee80211_queue_work(&sdata->local->hw, &sdata->work);
3639 }
3640 }
3641
3642 #ifdef CONFIG_PM
3643 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata)
3644 {
3645 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3646
3647 mutex_lock(&ifmgd->mtx);
3648 if (!ifmgd->associated) {
3649 mutex_unlock(&ifmgd->mtx);
3650 return;
3651 }
3652
3653 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) {
3654 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME;
3655 mlme_dbg(sdata, "driver requested disconnect after resume\n");
3656 ieee80211_sta_connection_lost(sdata,
3657 ifmgd->associated->bssid,
3658 WLAN_REASON_UNSPECIFIED,
3659 true);
3660 mutex_unlock(&ifmgd->mtx);
3661 return;
3662 }
3663 mutex_unlock(&ifmgd->mtx);
3664 }
3665 #endif
3666
3667 /* interface setup */
3668 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata)
3669 {
3670 struct ieee80211_if_managed *ifmgd;
3671
3672 ifmgd = &sdata->u.mgd;
3673 INIT_WORK(&ifmgd->monitor_work, ieee80211_sta_monitor_work);
3674 INIT_WORK(&ifmgd->chswitch_work, ieee80211_chswitch_work);
3675 INIT_WORK(&ifmgd->beacon_connection_loss_work,
3676 ieee80211_beacon_connection_loss_work);
3677 INIT_WORK(&ifmgd->csa_connection_drop_work,
3678 ieee80211_csa_connection_drop_work);
3679 INIT_WORK(&ifmgd->request_smps_work, ieee80211_request_smps_work);
3680 setup_timer(&ifmgd->timer, ieee80211_sta_timer,
3681 (unsigned long) sdata);
3682 setup_timer(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer,
3683 (unsigned long) sdata);
3684 setup_timer(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer,
3685 (unsigned long) sdata);
3686 setup_timer(&ifmgd->chswitch_timer, ieee80211_chswitch_timer,
3687 (unsigned long) sdata);
3688
3689 ifmgd->flags = 0;
3690 ifmgd->powersave = sdata->wdev.ps;
3691 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues;
3692 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len;
3693 ifmgd->p2p_noa_index = -1;
3694
3695 mutex_init(&ifmgd->mtx);
3696
3697 if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS)
3698 ifmgd->req_smps = IEEE80211_SMPS_AUTOMATIC;
3699 else
3700 ifmgd->req_smps = IEEE80211_SMPS_OFF;
3701 }
3702
3703 /* scan finished notification */
3704 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local)
3705 {
3706 struct ieee80211_sub_if_data *sdata;
3707
3708 /* Restart STA timers */
3709 rcu_read_lock();
3710 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
3711 if (ieee80211_sdata_running(sdata))
3712 ieee80211_restart_sta_timer(sdata);
3713 }
3714 rcu_read_unlock();
3715 }
3716
3717 int ieee80211_max_network_latency(struct notifier_block *nb,
3718 unsigned long data, void *dummy)
3719 {
3720 s32 latency_usec = (s32) data;
3721 struct ieee80211_local *local =
3722 container_of(nb, struct ieee80211_local,
3723 network_latency_notifier);
3724
3725 mutex_lock(&local->iflist_mtx);
3726 ieee80211_recalc_ps(local, latency_usec);
3727 mutex_unlock(&local->iflist_mtx);
3728
3729 return 0;
3730 }
3731
3732 static u8 ieee80211_ht_vht_rx_chains(struct ieee80211_sub_if_data *sdata,
3733 struct cfg80211_bss *cbss)
3734 {
3735 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3736 const u8 *ht_cap_ie, *vht_cap_ie;
3737 const struct ieee80211_ht_cap *ht_cap;
3738 const struct ieee80211_vht_cap *vht_cap;
3739 u8 chains = 1;
3740
3741 if (ifmgd->flags & IEEE80211_STA_DISABLE_HT)
3742 return chains;
3743
3744 ht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3745 if (ht_cap_ie && ht_cap_ie[1] >= sizeof(*ht_cap)) {
3746 ht_cap = (void *)(ht_cap_ie + 2);
3747 chains = ieee80211_mcs_to_chains(&ht_cap->mcs);
3748 /*
3749 * TODO: use "Tx Maximum Number Spatial Streams Supported" and
3750 * "Tx Unequal Modulation Supported" fields.
3751 */
3752 }
3753
3754 if (ifmgd->flags & IEEE80211_STA_DISABLE_VHT)
3755 return chains;
3756
3757 vht_cap_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3758 if (vht_cap_ie && vht_cap_ie[1] >= sizeof(*vht_cap)) {
3759 u8 nss;
3760 u16 tx_mcs_map;
3761
3762 vht_cap = (void *)(vht_cap_ie + 2);
3763 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map);
3764 for (nss = 8; nss > 0; nss--) {
3765 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) !=
3766 IEEE80211_VHT_MCS_NOT_SUPPORTED)
3767 break;
3768 }
3769 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */
3770 chains = max(chains, nss);
3771 }
3772
3773 return chains;
3774 }
3775
3776 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata,
3777 struct cfg80211_bss *cbss)
3778 {
3779 struct ieee80211_local *local = sdata->local;
3780 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3781 const struct ieee80211_ht_operation *ht_oper = NULL;
3782 const struct ieee80211_vht_operation *vht_oper = NULL;
3783 struct ieee80211_supported_band *sband;
3784 struct cfg80211_chan_def chandef;
3785 int ret;
3786
3787 sband = local->hw.wiphy->bands[cbss->channel->band];
3788
3789 ifmgd->flags &= ~(IEEE80211_STA_DISABLE_40MHZ |
3790 IEEE80211_STA_DISABLE_80P80MHZ |
3791 IEEE80211_STA_DISABLE_160MHZ);
3792
3793 rcu_read_lock();
3794
3795 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_HT) &&
3796 sband->ht_cap.ht_supported) {
3797 const u8 *ht_oper_ie, *ht_cap;
3798
3799 ht_oper_ie = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_OPERATION);
3800 if (ht_oper_ie && ht_oper_ie[1] >= sizeof(*ht_oper))
3801 ht_oper = (void *)(ht_oper_ie + 2);
3802
3803 ht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_HT_CAPABILITY);
3804 if (!ht_cap || ht_cap[1] < sizeof(struct ieee80211_ht_cap)) {
3805 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3806 ht_oper = NULL;
3807 }
3808 }
3809
3810 if (!(ifmgd->flags & IEEE80211_STA_DISABLE_VHT) &&
3811 sband->vht_cap.vht_supported) {
3812 const u8 *vht_oper_ie, *vht_cap;
3813
3814 vht_oper_ie = ieee80211_bss_get_ie(cbss,
3815 WLAN_EID_VHT_OPERATION);
3816 if (vht_oper_ie && vht_oper_ie[1] >= sizeof(*vht_oper))
3817 vht_oper = (void *)(vht_oper_ie + 2);
3818 if (vht_oper && !ht_oper) {
3819 vht_oper = NULL;
3820 sdata_info(sdata,
3821 "AP advertised VHT without HT, disabling both\n");
3822 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
3823 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3824 }
3825
3826 vht_cap = ieee80211_bss_get_ie(cbss, WLAN_EID_VHT_CAPABILITY);
3827 if (!vht_cap || vht_cap[1] < sizeof(struct ieee80211_vht_cap)) {
3828 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
3829 vht_oper = NULL;
3830 }
3831 }
3832
3833 ifmgd->flags |= ieee80211_determine_chantype(sdata, sband,
3834 cbss->channel,
3835 ht_oper, vht_oper,
3836 &chandef, true);
3837
3838 sdata->needed_rx_chains = min(ieee80211_ht_vht_rx_chains(sdata, cbss),
3839 local->rx_chains);
3840
3841 rcu_read_unlock();
3842
3843 /* will change later if needed */
3844 sdata->smps_mode = IEEE80211_SMPS_OFF;
3845
3846 /*
3847 * If this fails (possibly due to channel context sharing
3848 * on incompatible channels, e.g. 80+80 and 160 sharing the
3849 * same control channel) try to use a smaller bandwidth.
3850 */
3851 ret = ieee80211_vif_use_channel(sdata, &chandef,
3852 IEEE80211_CHANCTX_SHARED);
3853 while (ret && chandef.width != NL80211_CHAN_WIDTH_20_NOHT) {
3854 ifmgd->flags |= chandef_downgrade(&chandef);
3855 ret = ieee80211_vif_use_channel(sdata, &chandef,
3856 IEEE80211_CHANCTX_SHARED);
3857 }
3858 return ret;
3859 }
3860
3861 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata,
3862 struct cfg80211_bss *cbss, bool assoc)
3863 {
3864 struct ieee80211_local *local = sdata->local;
3865 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3866 struct ieee80211_bss *bss = (void *)cbss->priv;
3867 struct sta_info *new_sta = NULL;
3868 bool have_sta = false;
3869 int err;
3870
3871 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data))
3872 return -EINVAL;
3873
3874 if (assoc) {
3875 rcu_read_lock();
3876 have_sta = sta_info_get(sdata, cbss->bssid);
3877 rcu_read_unlock();
3878 }
3879
3880 if (!have_sta) {
3881 new_sta = sta_info_alloc(sdata, cbss->bssid, GFP_KERNEL);
3882 if (!new_sta)
3883 return -ENOMEM;
3884 }
3885
3886 if (new_sta) {
3887 u32 rates = 0, basic_rates = 0;
3888 bool have_higher_than_11mbit;
3889 int min_rate = INT_MAX, min_rate_index = -1;
3890 struct ieee80211_supported_band *sband;
3891 const struct cfg80211_bss_ies *ies;
3892
3893 sband = local->hw.wiphy->bands[cbss->channel->band];
3894
3895 err = ieee80211_prep_channel(sdata, cbss);
3896 if (err) {
3897 sta_info_free(local, new_sta);
3898 return err;
3899 }
3900
3901 ieee80211_get_rates(sband, bss->supp_rates,
3902 bss->supp_rates_len,
3903 &rates, &basic_rates,
3904 &have_higher_than_11mbit,
3905 &min_rate, &min_rate_index);
3906
3907 /*
3908 * This used to be a workaround for basic rates missing
3909 * in the association response frame. Now that we no
3910 * longer use the basic rates from there, it probably
3911 * doesn't happen any more, but keep the workaround so
3912 * in case some *other* APs are buggy in different ways
3913 * we can connect -- with a warning.
3914 */
3915 if (!basic_rates && min_rate_index >= 0) {
3916 sdata_info(sdata,
3917 "No basic rates, using min rate instead\n");
3918 basic_rates = BIT(min_rate_index);
3919 }
3920
3921 new_sta->sta.supp_rates[cbss->channel->band] = rates;
3922 sdata->vif.bss_conf.basic_rates = basic_rates;
3923
3924 /* cf. IEEE 802.11 9.2.12 */
3925 if (cbss->channel->band == IEEE80211_BAND_2GHZ &&
3926 have_higher_than_11mbit)
3927 sdata->flags |= IEEE80211_SDATA_OPERATING_GMODE;
3928 else
3929 sdata->flags &= ~IEEE80211_SDATA_OPERATING_GMODE;
3930
3931 memcpy(ifmgd->bssid, cbss->bssid, ETH_ALEN);
3932
3933 /* set timing information */
3934 sdata->vif.bss_conf.beacon_int = cbss->beacon_interval;
3935 rcu_read_lock();
3936 ies = rcu_dereference(cbss->beacon_ies);
3937 if (ies) {
3938 const u8 *tim_ie;
3939
3940 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3941 sdata->vif.bss_conf.sync_device_ts =
3942 bss->device_ts_beacon;
3943 tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
3944 ies->data, ies->len);
3945 if (tim_ie && tim_ie[1] >= 2)
3946 sdata->vif.bss_conf.sync_dtim_count = tim_ie[2];
3947 else
3948 sdata->vif.bss_conf.sync_dtim_count = 0;
3949 } else if (!(local->hw.flags &
3950 IEEE80211_HW_TIMING_BEACON_ONLY)) {
3951 ies = rcu_dereference(cbss->proberesp_ies);
3952 /* must be non-NULL since beacon IEs were NULL */
3953 sdata->vif.bss_conf.sync_tsf = ies->tsf;
3954 sdata->vif.bss_conf.sync_device_ts =
3955 bss->device_ts_presp;
3956 sdata->vif.bss_conf.sync_dtim_count = 0;
3957 } else {
3958 sdata->vif.bss_conf.sync_tsf = 0;
3959 sdata->vif.bss_conf.sync_device_ts = 0;
3960 sdata->vif.bss_conf.sync_dtim_count = 0;
3961 }
3962 rcu_read_unlock();
3963
3964 /* tell driver about BSSID, basic rates and timing */
3965 ieee80211_bss_info_change_notify(sdata,
3966 BSS_CHANGED_BSSID | BSS_CHANGED_BASIC_RATES |
3967 BSS_CHANGED_BEACON_INT);
3968
3969 if (assoc)
3970 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH);
3971
3972 err = sta_info_insert(new_sta);
3973 new_sta = NULL;
3974 if (err) {
3975 sdata_info(sdata,
3976 "failed to insert STA entry for the AP (error %d)\n",
3977 err);
3978 return err;
3979 }
3980 } else
3981 WARN_ON_ONCE(!ether_addr_equal(ifmgd->bssid, cbss->bssid));
3982
3983 return 0;
3984 }
3985
3986 /* config hooks */
3987 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata,
3988 struct cfg80211_auth_request *req)
3989 {
3990 struct ieee80211_local *local = sdata->local;
3991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3992 struct ieee80211_mgd_auth_data *auth_data;
3993 u16 auth_alg;
3994 int err;
3995
3996 /* prepare auth data structure */
3997
3998 switch (req->auth_type) {
3999 case NL80211_AUTHTYPE_OPEN_SYSTEM:
4000 auth_alg = WLAN_AUTH_OPEN;
4001 break;
4002 case NL80211_AUTHTYPE_SHARED_KEY:
4003 if (IS_ERR(local->wep_tx_tfm))
4004 return -EOPNOTSUPP;
4005 auth_alg = WLAN_AUTH_SHARED_KEY;
4006 break;
4007 case NL80211_AUTHTYPE_FT:
4008 auth_alg = WLAN_AUTH_FT;
4009 break;
4010 case NL80211_AUTHTYPE_NETWORK_EAP:
4011 auth_alg = WLAN_AUTH_LEAP;
4012 break;
4013 case NL80211_AUTHTYPE_SAE:
4014 auth_alg = WLAN_AUTH_SAE;
4015 break;
4016 default:
4017 return -EOPNOTSUPP;
4018 }
4019
4020 auth_data = kzalloc(sizeof(*auth_data) + req->sae_data_len +
4021 req->ie_len, GFP_KERNEL);
4022 if (!auth_data)
4023 return -ENOMEM;
4024
4025 auth_data->bss = req->bss;
4026
4027 if (req->sae_data_len >= 4) {
4028 __le16 *pos = (__le16 *) req->sae_data;
4029 auth_data->sae_trans = le16_to_cpu(pos[0]);
4030 auth_data->sae_status = le16_to_cpu(pos[1]);
4031 memcpy(auth_data->data, req->sae_data + 4,
4032 req->sae_data_len - 4);
4033 auth_data->data_len += req->sae_data_len - 4;
4034 }
4035
4036 if (req->ie && req->ie_len) {
4037 memcpy(&auth_data->data[auth_data->data_len],
4038 req->ie, req->ie_len);
4039 auth_data->data_len += req->ie_len;
4040 }
4041
4042 if (req->key && req->key_len) {
4043 auth_data->key_len = req->key_len;
4044 auth_data->key_idx = req->key_idx;
4045 memcpy(auth_data->key, req->key, req->key_len);
4046 }
4047
4048 auth_data->algorithm = auth_alg;
4049
4050 /* try to authenticate/probe */
4051
4052 mutex_lock(&ifmgd->mtx);
4053
4054 if ((ifmgd->auth_data && !ifmgd->auth_data->done) ||
4055 ifmgd->assoc_data) {
4056 err = -EBUSY;
4057 goto err_free;
4058 }
4059
4060 if (ifmgd->auth_data)
4061 ieee80211_destroy_auth_data(sdata, false);
4062
4063 /* prep auth_data so we don't go into idle on disassoc */
4064 ifmgd->auth_data = auth_data;
4065
4066 if (ifmgd->associated) {
4067 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4068
4069 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4070 WLAN_REASON_UNSPECIFIED,
4071 false, frame_buf);
4072
4073 __cfg80211_send_deauth(sdata->dev, frame_buf,
4074 sizeof(frame_buf));
4075 }
4076
4077 sdata_info(sdata, "authenticate with %pM\n", req->bss->bssid);
4078
4079 err = ieee80211_prep_connection(sdata, req->bss, false);
4080 if (err)
4081 goto err_clear;
4082
4083 err = ieee80211_probe_auth(sdata);
4084 if (err) {
4085 sta_info_destroy_addr(sdata, req->bss->bssid);
4086 goto err_clear;
4087 }
4088
4089 /* hold our own reference */
4090 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss);
4091 err = 0;
4092 goto out_unlock;
4093
4094 err_clear:
4095 memset(ifmgd->bssid, 0, ETH_ALEN);
4096 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4097 ifmgd->auth_data = NULL;
4098 err_free:
4099 kfree(auth_data);
4100 out_unlock:
4101 mutex_unlock(&ifmgd->mtx);
4102
4103 return err;
4104 }
4105
4106 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata,
4107 struct cfg80211_assoc_request *req)
4108 {
4109 struct ieee80211_local *local = sdata->local;
4110 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4111 struct ieee80211_bss *bss = (void *)req->bss->priv;
4112 struct ieee80211_mgd_assoc_data *assoc_data;
4113 const struct cfg80211_bss_ies *beacon_ies;
4114 struct ieee80211_supported_band *sband;
4115 const u8 *ssidie, *ht_ie, *vht_ie;
4116 int i, err;
4117
4118 assoc_data = kzalloc(sizeof(*assoc_data) + req->ie_len, GFP_KERNEL);
4119 if (!assoc_data)
4120 return -ENOMEM;
4121
4122 rcu_read_lock();
4123 ssidie = ieee80211_bss_get_ie(req->bss, WLAN_EID_SSID);
4124 if (!ssidie) {
4125 rcu_read_unlock();
4126 kfree(assoc_data);
4127 return -EINVAL;
4128 }
4129 memcpy(assoc_data->ssid, ssidie + 2, ssidie[1]);
4130 assoc_data->ssid_len = ssidie[1];
4131 rcu_read_unlock();
4132
4133 mutex_lock(&ifmgd->mtx);
4134
4135 if (ifmgd->associated) {
4136 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4137
4138 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4139 WLAN_REASON_UNSPECIFIED,
4140 false, frame_buf);
4141
4142 __cfg80211_send_deauth(sdata->dev, frame_buf,
4143 sizeof(frame_buf));
4144 }
4145
4146 if (ifmgd->auth_data && !ifmgd->auth_data->done) {
4147 err = -EBUSY;
4148 goto err_free;
4149 }
4150
4151 if (ifmgd->assoc_data) {
4152 err = -EBUSY;
4153 goto err_free;
4154 }
4155
4156 if (ifmgd->auth_data) {
4157 bool match;
4158
4159 /* keep sta info, bssid if matching */
4160 match = ether_addr_equal(ifmgd->bssid, req->bss->bssid);
4161 ieee80211_destroy_auth_data(sdata, match);
4162 }
4163
4164 /* prepare assoc data */
4165
4166 ifmgd->beacon_crc_valid = false;
4167
4168 /*
4169 * IEEE802.11n does not allow TKIP/WEP as pairwise ciphers in HT mode.
4170 * We still associate in non-HT mode (11a/b/g) if any one of these
4171 * ciphers is configured as pairwise.
4172 * We can set this to true for non-11n hardware, that'll be checked
4173 * separately along with the peer capabilities.
4174 */
4175 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) {
4176 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 ||
4177 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP ||
4178 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) {
4179 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4180 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4181 netdev_info(sdata->dev,
4182 "disabling HT/VHT due to WEP/TKIP use\n");
4183 }
4184 }
4185
4186 if (req->flags & ASSOC_REQ_DISABLE_HT) {
4187 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4188 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4189 }
4190
4191 if (req->flags & ASSOC_REQ_DISABLE_VHT)
4192 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4193
4194 /* Also disable HT if we don't support it or the AP doesn't use WMM */
4195 sband = local->hw.wiphy->bands[req->bss->channel->band];
4196 if (!sband->ht_cap.ht_supported ||
4197 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4198 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4199 if (!bss->wmm_used)
4200 netdev_info(sdata->dev,
4201 "disabling HT as WMM/QoS is not supported by the AP\n");
4202 }
4203
4204 /* disable VHT if we don't support it or the AP doesn't use WMM */
4205 if (!sband->vht_cap.vht_supported ||
4206 local->hw.queues < IEEE80211_NUM_ACS || !bss->wmm_used) {
4207 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4208 if (!bss->wmm_used)
4209 netdev_info(sdata->dev,
4210 "disabling VHT as WMM/QoS is not supported by the AP\n");
4211 }
4212
4213 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa));
4214 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask,
4215 sizeof(ifmgd->ht_capa_mask));
4216
4217 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa));
4218 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask,
4219 sizeof(ifmgd->vht_capa_mask));
4220
4221 if (req->ie && req->ie_len) {
4222 memcpy(assoc_data->ie, req->ie, req->ie_len);
4223 assoc_data->ie_len = req->ie_len;
4224 }
4225
4226 assoc_data->bss = req->bss;
4227
4228 if (ifmgd->req_smps == IEEE80211_SMPS_AUTOMATIC) {
4229 if (ifmgd->powersave)
4230 sdata->smps_mode = IEEE80211_SMPS_DYNAMIC;
4231 else
4232 sdata->smps_mode = IEEE80211_SMPS_OFF;
4233 } else
4234 sdata->smps_mode = ifmgd->req_smps;
4235
4236 assoc_data->capability = req->bss->capability;
4237 assoc_data->wmm = bss->wmm_used &&
4238 (local->hw.queues >= IEEE80211_NUM_ACS);
4239 assoc_data->supp_rates = bss->supp_rates;
4240 assoc_data->supp_rates_len = bss->supp_rates_len;
4241
4242 rcu_read_lock();
4243 ht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_HT_OPERATION);
4244 if (ht_ie && ht_ie[1] >= sizeof(struct ieee80211_ht_operation))
4245 assoc_data->ap_ht_param =
4246 ((struct ieee80211_ht_operation *)(ht_ie + 2))->ht_param;
4247 else
4248 ifmgd->flags |= IEEE80211_STA_DISABLE_HT;
4249 vht_ie = ieee80211_bss_get_ie(req->bss, WLAN_EID_VHT_CAPABILITY);
4250 if (vht_ie && vht_ie[1] >= sizeof(struct ieee80211_vht_cap))
4251 memcpy(&assoc_data->ap_vht_cap, vht_ie + 2,
4252 sizeof(struct ieee80211_vht_cap));
4253 else
4254 ifmgd->flags |= IEEE80211_STA_DISABLE_VHT;
4255 rcu_read_unlock();
4256
4257 if (bss->wmm_used && bss->uapsd_supported &&
4258 (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) &&
4259 sdata->wmm_acm != 0xff) {
4260 assoc_data->uapsd = true;
4261 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED;
4262 } else {
4263 assoc_data->uapsd = false;
4264 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED;
4265 }
4266
4267 if (req->prev_bssid)
4268 memcpy(assoc_data->prev_bssid, req->prev_bssid, ETH_ALEN);
4269
4270 if (req->use_mfp) {
4271 ifmgd->mfp = IEEE80211_MFP_REQUIRED;
4272 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED;
4273 } else {
4274 ifmgd->mfp = IEEE80211_MFP_DISABLED;
4275 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED;
4276 }
4277
4278 if (req->crypto.control_port)
4279 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT;
4280 else
4281 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT;
4282
4283 sdata->control_port_protocol = req->crypto.control_port_ethertype;
4284 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt;
4285
4286 /* kick off associate process */
4287
4288 ifmgd->assoc_data = assoc_data;
4289 ifmgd->dtim_period = 0;
4290
4291 err = ieee80211_prep_connection(sdata, req->bss, true);
4292 if (err)
4293 goto err_clear;
4294
4295 rcu_read_lock();
4296 beacon_ies = rcu_dereference(req->bss->beacon_ies);
4297
4298 if (sdata->local->hw.flags & IEEE80211_HW_NEED_DTIM_BEFORE_ASSOC &&
4299 !beacon_ies) {
4300 /*
4301 * Wait up to one beacon interval ...
4302 * should this be more if we miss one?
4303 */
4304 sdata_info(sdata, "waiting for beacon from %pM\n",
4305 ifmgd->bssid);
4306 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval);
4307 assoc_data->timeout_started = true;
4308 assoc_data->need_beacon = true;
4309 } else if (beacon_ies) {
4310 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM,
4311 beacon_ies->data,
4312 beacon_ies->len);
4313 u8 dtim_count = 0;
4314
4315 if (tim_ie && tim_ie[1] >= sizeof(struct ieee80211_tim_ie)) {
4316 const struct ieee80211_tim_ie *tim;
4317 tim = (void *)(tim_ie + 2);
4318 ifmgd->dtim_period = tim->dtim_period;
4319 dtim_count = tim->dtim_count;
4320 }
4321 assoc_data->have_beacon = true;
4322 assoc_data->timeout = jiffies;
4323 assoc_data->timeout_started = true;
4324
4325 if (local->hw.flags & IEEE80211_HW_TIMING_BEACON_ONLY) {
4326 sdata->vif.bss_conf.sync_tsf = beacon_ies->tsf;
4327 sdata->vif.bss_conf.sync_device_ts =
4328 bss->device_ts_beacon;
4329 sdata->vif.bss_conf.sync_dtim_count = dtim_count;
4330 }
4331 } else {
4332 assoc_data->timeout = jiffies;
4333 assoc_data->timeout_started = true;
4334 }
4335 rcu_read_unlock();
4336
4337 run_again(ifmgd, assoc_data->timeout);
4338
4339 if (bss->corrupt_data) {
4340 char *corrupt_type = "data";
4341 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) {
4342 if (bss->corrupt_data &
4343 IEEE80211_BSS_CORRUPT_PROBE_RESP)
4344 corrupt_type = "beacon and probe response";
4345 else
4346 corrupt_type = "beacon";
4347 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP)
4348 corrupt_type = "probe response";
4349 sdata_info(sdata, "associating with AP with corrupt %s\n",
4350 corrupt_type);
4351 }
4352
4353 err = 0;
4354 goto out;
4355 err_clear:
4356 memset(ifmgd->bssid, 0, ETH_ALEN);
4357 ieee80211_bss_info_change_notify(sdata, BSS_CHANGED_BSSID);
4358 ifmgd->assoc_data = NULL;
4359 err_free:
4360 kfree(assoc_data);
4361 out:
4362 mutex_unlock(&ifmgd->mtx);
4363
4364 return err;
4365 }
4366
4367 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata,
4368 struct cfg80211_deauth_request *req)
4369 {
4370 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4371 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4372 bool tx = !req->local_state_change;
4373 bool report_frame = false;
4374
4375 mutex_lock(&ifmgd->mtx);
4376
4377 sdata_info(sdata,
4378 "deauthenticating from %pM by local choice (reason=%d)\n",
4379 req->bssid, req->reason_code);
4380
4381 if (ifmgd->auth_data) {
4382 drv_mgd_prepare_tx(sdata->local, sdata);
4383 ieee80211_send_deauth_disassoc(sdata, req->bssid,
4384 IEEE80211_STYPE_DEAUTH,
4385 req->reason_code, tx,
4386 frame_buf);
4387 ieee80211_destroy_auth_data(sdata, false);
4388 mutex_unlock(&ifmgd->mtx);
4389
4390 report_frame = true;
4391 goto out;
4392 }
4393
4394 if (ifmgd->associated &&
4395 ether_addr_equal(ifmgd->associated->bssid, req->bssid)) {
4396 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH,
4397 req->reason_code, tx, frame_buf);
4398 report_frame = true;
4399 }
4400 mutex_unlock(&ifmgd->mtx);
4401
4402 out:
4403 if (report_frame)
4404 __cfg80211_send_deauth(sdata->dev, frame_buf,
4405 IEEE80211_DEAUTH_FRAME_LEN);
4406
4407 return 0;
4408 }
4409
4410 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata,
4411 struct cfg80211_disassoc_request *req)
4412 {
4413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4414 u8 bssid[ETH_ALEN];
4415 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN];
4416
4417 mutex_lock(&ifmgd->mtx);
4418
4419 /*
4420 * cfg80211 should catch this ... but it's racy since
4421 * we can receive a disassoc frame, process it, hand it
4422 * to cfg80211 while that's in a locked section already
4423 * trying to tell us that the user wants to disconnect.
4424 */
4425 if (ifmgd->associated != req->bss) {
4426 mutex_unlock(&ifmgd->mtx);
4427 return -ENOLINK;
4428 }
4429
4430 sdata_info(sdata,
4431 "disassociating from %pM by local choice (reason=%d)\n",
4432 req->bss->bssid, req->reason_code);
4433
4434 memcpy(bssid, req->bss->bssid, ETH_ALEN);
4435 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC,
4436 req->reason_code, !req->local_state_change,
4437 frame_buf);
4438 mutex_unlock(&ifmgd->mtx);
4439
4440 __cfg80211_send_disassoc(sdata->dev, frame_buf,
4441 IEEE80211_DEAUTH_FRAME_LEN);
4442
4443 return 0;
4444 }
4445
4446 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata)
4447 {
4448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4449
4450 /*
4451 * Make sure some work items will not run after this,
4452 * they will not do anything but might not have been
4453 * cancelled when disconnecting.
4454 */
4455 cancel_work_sync(&ifmgd->monitor_work);
4456 cancel_work_sync(&ifmgd->beacon_connection_loss_work);
4457 cancel_work_sync(&ifmgd->request_smps_work);
4458 cancel_work_sync(&ifmgd->csa_connection_drop_work);
4459 cancel_work_sync(&ifmgd->chswitch_work);
4460
4461 mutex_lock(&ifmgd->mtx);
4462 if (ifmgd->assoc_data)
4463 ieee80211_destroy_assoc_data(sdata, false);
4464 if (ifmgd->auth_data)
4465 ieee80211_destroy_auth_data(sdata, false);
4466 del_timer_sync(&ifmgd->timer);
4467 mutex_unlock(&ifmgd->mtx);
4468 }
4469
4470 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif,
4471 enum nl80211_cqm_rssi_threshold_event rssi_event,
4472 gfp_t gfp)
4473 {
4474 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4475
4476 trace_api_cqm_rssi_notify(sdata, rssi_event);
4477
4478 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, gfp);
4479 }
4480 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify);
kernel source for telekom puls (alcatel/mediatek)